Selective Service Act: Drafted 2.8 million men during the war
Women fill roles typically reserved for men: Head of household, farmers, factory workers, drivers, police, etc.
Great Migration: African Americans move north and west to fill factory jobs and to escape sharecropping and Jim Crow laws
Mexicans came to U.S seeking job opportunities
Nationalism, hysteria, nativism leads to restrictions on immigration and attacks on all things German
Sedition and Espionage Acts: Criminalize protesting the war, draft, war bonds, etc.