During WWII, Lipstick Became A Sign Of Patriotism²
Bright red lipstick roared back into fashion during WWII for a surprising reason. Hitler reportedly hated red lipstick, so American women painted their lips to tell off Hitler's supporters.
Women flooded the factories and the battlefields in the 1940s, wearing red lipstick as a sign of patriotism and bravery. The Marines created a mandatory lipstick for female Marines called Montezuma Red. The red color represented the American flag and came to symbolize strength.