The policy of kept the United States out of the fighting during the first few years of World War II. The policy of
prompted Britain and France to agree to Germany’s demand for Sudetenland in Czechoslovakia.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.

mapmaking. cartography had been an art form for many years, but it wasn’t until the renaissance when ptolemy’s ancient system of latitude and longitude was rediscovered that mapmakers were able to make surprisingly accurate and useful maps.

b. the treaty of ghent, which ended the war, had already been signed.