 If, as usually happened, the Spartans achieved victory on their side, they would then wheel left and roll up the enemy formation.During the Peloponnesian War, engagements became more fluid, light troops became increasingly used and tactics evolved to meet them, but in direct confrontations between two opposing phalanxes, stamina and "pushing ability" were what counted.It was only when the Thebans, under Epaminondas increased the depth of a part of their formation at the Battle of Leuctra that the Spartan phalanx broke.