n 1942, the Canadians and the British Navy launched a practice invasion of France, the “Dieppe Raid.” 20% were killed, 10% wounded, 30% captured. The lessons learned in that disaster lead to D-Day’s success.

Ants keep slaves. Certain species, the so-called sanguinary ants in particular, raid the nests of other ant tribes, kill the queen, and kidnap many of the workers. The workers are brought back to the captors’ hive, where they are coerced into performing menial tasks.