Trueeee I think I read this Wikipedia and it said that so yeah
During World war 2 which started in the 19th century, African-American units were utilized by the Army to combat the Native Americans during the Wars. The most noted among this group were the Buffalo Soldiers. Many of these men were unofficially allowed to enlist in the Union Army The African-American men registered for the draft, and black women also volunteered in large numbers. While serving in the Army, Army Air Forces, Navy, Marine Corps, and Coast Guard, they experienced discrimination and segregation but met the challenge and persevered.
Answer:Open Door policy, statement of principles initiated by the United States in 1899 and 1900 for the protection of equal privileges among countries trading with China and in support of Chinese territorial and administrative integrity.
Explanation:
During world war 1, The Great Britain was known as the best naval army in the world. Germany know that they cannot face the British naval army on the surface, so they invested in more submarines to help them sustain the attack from sea.
Germany use the submarines mainly to destroy ships that deliver supplies for allied countries in order to weakened them. Even though eventually Germany still lost, without submarine the allied forces would destroyed them even faster.