6.2 Technology and U.S. Entry WW1

made troops more vulnerable to long-range missiles, resulting in heavy casualties.

required highly skilled soldiers, resulting in lengthy training periods.

made frontal assaults difficult, resulting in long periods of stalemate.

required the ability to attack quickly, resulting in a reliance on cavalry forces.

lead infantry advances across no-man's-land and into enemy territory.

destroy railroads and bridges used by enemy troops.

release chemical weapons in advance attacks on enemy positions.

launch long-range rockets at enemy aircraft.

The United States had suffered economically from European sanctions.

A European nation had taken aggressive actions against the United States.

The U.S. president was obligated to fulfill election campaign promises.

Communist activities among U.S. immigrants were threatening the country.

Germany joined the Central Powers.

U.S. public opinion shifted against Germany.

Germany refused to join the League of Nations.

U.S. leaders proposed a military alliance with Germany.