Battle of Watling Street
A woman named Boudica started a uprising against the Romans after, she ralied some 230.000 warriors, the Roman govenour rallyed only his own legion, parts of a second legion and whatever axularies he could get together, a total of 10.000 warriors. Boudica certain of her victory even put all the wagons into a half circle behind her troops and putted the woman and children on them. Well lets say that superiour roman technology, strategy and discipline prevailed again, after the rebels routed they were cut off by their own wagons and a lot of them mercilessly murdered by the romans, some 80.000 dead on the side of the rebels, only 400 romans died
Boudica poisoned herself after that.
yeah preaty big fail, loosing while outnumbering the enemy 20:1