But Due to the fact direct confrontations between opposing phalanxes required stamina and pushing ability, engagements became fluid over the Peloponnesian War. (Gill 2000) In the Battle of Leuctra when the Thebans, below Epaminondas elevated the depth of an element of their development, the Spartan phalanx broke and Sparta fell waiting for link from Web 2.0 Profiles (2)