Authoritarian monarchy.
"Old" oligarchy.
"New" oligarchy.
Semicompetitive authoritarianism.
Socialist authoritarianism
Military regimes.
The United States entered WWII after the Japanese bombed Pearl Harbor.
Explanation:
Red Guards, in Chinese history, groups of militant university and high school students formed into paramilitary units as part of the Cultural Revolution (1966–76). These young people often wore green jackets similar to the uniforms of the Chinese army at the time, with red armbands attached to one.