Biplanes were the first type of plane to be involved in combat. They were very common in [[World War I]], and several types of biplane saw action in the early years of [[World War II]], although all had been phased out by the end of the war. Most countries still use biplanes in pilot training. | Biplanes were the first type of plane to be involved in combat. They were very common in [[World War I]], and several types of biplane saw action in the early years of [[World War II]], although all had been phased out by the end of the war. Most countries still use biplanes in pilot training. |