Short answers, pulled from the story.
The Indian Removal Act forced approximately 60,000 Native Americans to move west of the Mississippi River and resulted in about 16,700 deaths during the journey known as the Trail of Tears.
The year 1898 marked a turning point when the United States annexed Hawaii and fought Spain over Cuba and the Philippines while Theodore Roosevelt served as Assistant Secretary of the Navy preparing for war.
Up to 200,000 people died during the subsequent Guatemalan genocide which followed Operation PBFortune that overthrew President Jacobo Árbenz in 1952 with support from the US government.
In 2015 the Department of Defense reported 587 bases though independent counts reached 800 including 174 in Germany 113 in Japan and 83 in South Korea.
English became the global lingua franca for production with 95% to 98% of scientific publications written in that language by 2024.