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.
