What significant event took place on November 11, 1918?

The date November 11, 1918, is significant because it marks the end of World War I with the signing of the Armistice. This agreement halted the fighting on the Western Front and led to the eventual peace treaties that concluded the war. The Armistice Day, as it was initially known, commemorates the cessation of hostilities and is recognized in various countries as a day to honor veterans and the sacrifices made during the war.

The founding of the Air Service, the appointment of General Mitchell, and the beginning of World War I are events related to military aviation and history, but they occur either before or after this pivotal date, making them less significant in the context of the question about this particular day. The significance of November 11 lies squarely in its role in bringing an end to one of the deadliest conflicts in history, forming the backdrop for both future military engagements and the development of aviation in warfare.