Answer:
After the Wright brothers began flying in 1903, mechanics from Europe and the U.S. began experimenting with different designs. World War I was a boon for the pastime of aviation because every country at war realized how important airplanes could be. At first, planes got more stable and durable, but by the end of the war, they were being designed to fight against each other. They had become more maneuverable, could be fixed with mounted guns, and were faster than ever before.
It helped them with trade, and also gave their army manh roads to use. They could trade and go to war with virtually anyone. They are also the first example of modern roads we see in ancient times.
