The answer is the United States
Answer:
Firstly most of the war was fought as a guerrilla war. This is a type of war which conventional forces such as the US army in Vietnam, find notoriously difficult to fight. Conventional forces are easy to identify, guerrillas are not. In Vietnam the Vietcong were peasants by day and guerrillas by night.
Explanation:
D. Listing options to find a solution. Sorry if I’m not right
Increasing tensions between European countries.
It started because of the assassination of Franz, and it was by a nationalist, then Germany moved forces into the Rhineland.
