What wasn't? The Power Armor/Mech? It was in third movie. And in the book, it really was the main winning force and why it was called Mobile Infantry.
sar·casm | \ ˈsär-ˌka-zəm \
1: a sharp and often satirical or ironic utterance designed to cut or give pain
2a: a mode of satirical wit depending for its effect on bitter, caustic, and often ironic language that is usually directed against an individual
b: the use or language of sarcasm
