1. War refers to the general term for war, while warfare refers to the state of conflict or specific methods of combat.2. Warfare has the following phrasal verbs: - Electronic warfare: The use of weapons controlled by computer for war purposes. - Psychological warfare: The use of psychological tactics to influence or manipulate adversaries. - Positional warfare: A type of warfare fought from fixed positions.3. Examples of usage for warfare: - There is no sign of the intergenerational warfare predicted in the 1990s. - The debate soon degenerated into open warfare. - Lenin dismissed guerrilla warfare as "adventurism."4. Examples of usage for war: - During the Warring States Period, there was the Chongyang Festival. - He retired long before the war. - Finally, the Pig War was over and only one shot was fired.