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battle against 40 pegasuses:
army after the battle:
53 centaurs, 4 dwarves, 13 wood elves, 15 high elves.
battle against 50 vampires:
initial army:
56 centaurs, 13 goblins, 7 riders, 3 dwarves, 13 wood elves, 15 high elves.
By the way, my friend also defeated pegasuses in a similar way. He had:
81 centaurs, 13 wood elves, 15 high elves.