The Civil War.
O Simultaneous because neither side had time to respond to the tactics of the other. Each had to decide before the Civil War began on its strategy and then engage.
O Both sequential and simultaneous. Sequential because battles are initiated one after the other, allowing each side to respond to the other in sequence.
O Simultaneous in that the battles are fought where each side determines a strategy and engages at the same time.
O Sequential because the Civil War had many sequential battles.
O Neither sequential nor simultaneous. Wars cannot be characterized within the game theory framework.