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6 Generals Who Switched Sides Hoping for Reward

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Military turncoats come in all shapes and sizes, motivated by all sorts of considerations: power, revenge, disillusionment, and, most often, the sound of a little extra coin. But not every turncoat seems to bear the tarnished rep old Benedict Arnold came away with. The following are some of history's lesser-known traitors, but ones who were pleased with the results.

1. Flavius Josephus (ca. 37"“100)

Revolutionary governments, caught up in the heat of the moment, often make poor decisions. For example, the Jewish rebels fighting against Rome appointed Joseph ben Matthias to be military governor of Galilee. An inveterate coward, however, Joseph surrendered at the first opportunity and became the Roman general Flavius Vespasianus's adviser on Jewish affairs. A nice gig, for sure. And when Flavius became emperor in the year 69, Joseph (or Josephus, as his new pals called him) found himself vaulted to the top of Roman high society. After trying to encourage the surrender of Jerusalem by shouting propaganda at the walls, he retired to Rome and became a famous author. The guilt of his treason may have caught up with old Josephus in his old age; he penned numerous writings lauding Jewish civilization, possibly to try to clear his conscience.

2. Alaric (ca. 370"“410)

A nobleman of the Visigoths, a Germanic tribe living in central Europe, Alaric fought for the Roman emperor Theodosius I against the rebel Eugenius. The brilliant decision to hire Alaric, though, gave the cunning nobleman an insider's view of the empire's weaknesses, and he took careful note. When Theodosius died in 395, the empire was divided into eastern and western halves ruled by his quarreling sons—and Alaric decided opportunity wasn't just knocking, it was practically kicking down his door. Alaric marched on Constantinople and ravaged the Thracian countryside, capturing most of Greece before the Roman general Stilicho forced him to withdraw. Soon after, the eastern emperor Arcadius gave Alaric control of most of Illyria, all of which paved the way for his first invasion of Italy in 401.

Alaric invaded the nation of his former employment several more times, and in 410 he became the first "barbarian" king to sack Rome in over 500 years. Though Alaric died in a plague in his 40s, his descendants carved out an empire of their own in what is now southern France, Spain, and Portugal.

3. Rodrigo Díaz de Vivar (El Cid, Campeador) (1043"“1099)

Balboa_Park_El_Cid_statue_2.jpgHis very title speaks of a checkered past: El Cid comes from the Arabic al-Sayyid, or "the lord," while Campeador is Spanish for "champion." Back when it all started, El Cid was a commander in the army of Castile. Of course, the cocky commander wasn't all roses to work with, and the Cid was forced to flee in 1080 after angering King Alfonso. What's an out-of-work commander to do, though? El Cid quickly decided to shack up with the enemy, joining forces with the Muslim emir (king) of Zaragosa. Despite the emir's cantankerous relationship with Castile, El Cid fought valiantly with his former foes for several years. That is, until Spain was invaded by Berber fanatics from North Africa. Bathing in schadenfreude, El Cid was summoned back by Alfonso, profusely apologized to, and begged to defeat the seemingly invincible invaders. El Cid accepted, and in the course of the fighting, "the Champion" maneuvered himself into the top spot in Valencia, the gem of Spain's Mediterranean coast. He died in 1099 fighting off a new wave of North African attackers, but even after his death proved useful. The city's defenders strapped the Cid's rapidly-assuming-room-temperature form to the back of his horse and managed to trick the enemies into thinking El Cid, Campeador, was still in charge. [Image courtesy of Stan Shebs.]

4. Francesco Sforza (1401"“1466)

Warfare in 15th-century Italy was dominated by the condottieri, mercenary generals who commanded motley crews of hungry soldiers. Of course, the soldiers for hire weren't exactly loved by everyone, and were seen as particularly uncouth by those gallant few who fought for land instead of money. The son of one of the most successful of the condottieri, Francesco Sforza was known for his great strength: reportedly, he could bend iron bars with his bare hands. Of course, as a mercenary, his loyalties were just as easily bent. After signing on with various feudal lords in their endless wars, he settled down in Milan and joined forces with Filippo Visconti, the local duke. On Visconti's death in 1447, however, Francesco turned on the duke's family and exiled or killed many of them. He also broke up an attempt to establish a Milanese republic, and then made himself duke. It's not nearly as bad as it sounds, though. Francesco went on to usher in nearly two decades of the best rule Milan had ever seen.

5. Albrecht Wenzel Eusebius von Wallenstein (1583"“1634)

A minor, though well-educated, Czech nobleman, Wallenstein became an officer in the armies of the Holy Roman Empire. He fought numerous battles against Venice and other powers and gained a reputation for military genius. But when his fellow Protestants rebelled against the empire in 1618, ushering in the Thirty Years' War, imperial generals worked themselves into a tizzy fearing that they would face Wallenstein on the field. They needn't have worried, though. A man whose eye was always on the bottom line, Wallenstein calculated that the rewards of serving the Catholic side of the war were greater. He helped crush Protestant armies in his native Bohemia as well as in western and northern Germany. Removed from command in 1630 on suspicion of preparing to switch sides, he was reinstated shortly thereafter on the rationale that a general thought to be disloyal was probably better than generals known to be incompetent. In retrospect, however, the reasoning was questionable, as Wallenstein was killed in 1634 while attempting to defect to the Swedes.

6. Shi Lang (1621"“1696)

An admiral in the navy of China's Ming dynasty, Shi Lang came into conflict with Zheng Chenggong, a rival general. Deciding that the grass looked greener up north, he defected in 1646 to the Manchus, and left his family behind to be slaughtered as traitors. Was it worth the (very literal) sacrifice? Apparently so. Lacking experienced naval officers, the Manchu ruler Shunzhi welcomed Shi Lang with open arms, and the officer happily participated in the Manchu conquest of China. In fact, he became an mental-floss-forbidden-knowledge.jpgofficial of the new Qing dynasty, made up of Shunzhi's descendants. Then, in 1681, he even got to lead the conquest of Taiwan, which culminated in the surrender of his old enemies, the Zheng family. In the end, Shi Lang made out pretty well, and was given the title "General Who Maintains Peace on the Seas" by a very grateful imperial government.


This article was excerpted from "Forbidden Knowledge: A Wickedly Smart Guide to History's Naughtiest Bits."

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Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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8 Common Dog Behaviors, Decoded
May 25, 2017
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Dogs are a lot more complicated than we give them credit for. As a result, sometimes things get lost in translation. We’ve yet to invent a dog-to-English translator, but there are certain behaviors you can learn to read in order to better understand what your dog is trying to tell you. The more tuned-in you are to your dog’s emotions, the better you’ll be able to respond—whether that means giving her some space or welcoming a wet, slobbery kiss. 

1. What you’ll see: Your dog is standing with his legs and body relaxed and tail low. His ears are up, but not pointed forward. His mouth is slightly open, he’s panting lightly, and his tongue is loose. His eyes? Soft or maybe slightly squinty from getting his smile on.

What it means: “Hey there, friend!” Your pup is in a calm, relaxed state. He’s open to mingling, which means you can feel comfortable letting friends say hi.

2. What you’ll see: Your dog is standing with her body leaning forward. Her ears are erect and angled forward—or have at least perked up if they’re floppy—and her mouth is closed. Her tail might be sticking out horizontally or sticking straight up and wagging slightly.

What it means: “Hark! Who goes there?!” Something caught your pup’s attention and now she’s on high alert, trying to discern whether or not the person, animal, or situation is a threat. She’ll likely stay on guard until she feels safe or becomes distracted.

3. What you’ll see: Your dog is standing, leaning slightly forward. His body and legs are tense, and his hackles—those hairs along his back and neck—are raised. His tail is stiff and twitching, not swooping playfully. His mouth is open, teeth are exposed, and he may be snarling, snapping, or barking excessively.

What it means: “Don’t mess with me!” This dog is asserting his social dominance and letting others know that he might attack if they don’t defer accordingly. A dog in this stance could be either offensively aggressive or defensively aggressive. If you encounter a dog in this state, play it safe and back away slowly without making eye contact.

4. What you’ll see: As another dog approaches, your dog lies down on his back with his tail tucked in between his legs. His paws are tucked in too, his ears are flat, and he isn’t making direct eye contact with the other dog standing over him.

What it means: “I come in peace!” Your pooch is displaying signs of submission to a more dominant dog, conveying total surrender to avoid physical confrontation. Other, less obvious, signs of submission include ears that are flattened back against the head, an avoidance of eye contact, a tongue flick, and bared teeth. Yup—a dog might bare his teeth while still being submissive, but they’ll likely be clenched together, the lips opened horizontally rather than curled up to show the front canines. A submissive dog will also slink backward or inward rather than forward, which would indicate more aggressive behavior.

5. What you’ll see: Your dog is crouching with her back hunched, tail tucked, and the corner of her mouth pulled back with lips slightly curled. Her shoulders, or hackles, are raised and her ears are flattened. She’s avoiding eye contact.

What it means: “I’m scared, but will fight you if I have to.” This dog’s fight or flight instincts have been activated. It’s best to keep your distance from a dog in this emotional state because she could attack if she feels cornered.

6. What you’ll see: You’re staring at your dog, holding eye contact. Your dog looks away from you, tentatively looks back, then looks away again. After some time, he licks his chops and yawns.

What it means: “I don’t know what’s going on and it’s weirding me out.” Your dog doesn’t know what to make of the situation, but rather than nipping or barking, he’ll stick to behaviors he knows are OK, like yawning, licking his chops, or shaking as if he’s wet. You’ll want to intervene by removing whatever it is causing him discomfort—such as an overly grabby child—and giving him some space to relax.

7. What you’ll see: Your dog has her front paws bent and lowered onto the ground with her rear in the air. Her body is relaxed, loose, and wiggly, and her tail is up and wagging from side to side. She might also let out a high-pitched or impatient bark.

What it means: “What’s the hold up? Let’s play!” This classic stance, known to dog trainers and behaviorists as “the play bow,” is a sign she’s ready to let the good times roll. Get ready for a round of fetch or tug of war, or for a good long outing at the dog park.

8. What you’ll see: You’ve just gotten home from work and your dog rushes over. He can’t stop wiggling his backside, and he may even lower himself into a giant stretch, like he’s doing yoga.

What it means: “OhmygoshImsohappytoseeyou I love you so much you’re my best friend foreverandeverandever!!!!” This one’s easy: Your pup is overjoyed his BFF is back. That big stretch is something dogs don’t pull out for just anyone; they save that for the people they truly love. Show him you feel the same way with a good belly rub and a handful of his favorite treats.

The best way to say “I love you” in dog? A monthly subscription to BarkBox. Your favorite pup will get a package filled with treats, toys, and other good stuff (and in return, you’ll probably get lots of sloppy kisses). Visit BarkBox to learn more.

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