What were the economic effects of the crusades?

brainliest brother World War I was the first war where the airplane was used. Initially, airplanes were used to observe enemy troops. However, by the end of the war they were used to drop bombs on troops and cities. They also had mounted machine guns that were used to shoot down other planes.

i believe that the correct answer is a canadian hero.

explanation: he is celebrated as a national hero in canada for successfully thwarting a united states takeover of canada during the war of 1812.