Final answer:
The Geneva Conventions came into force for the United States in 1955, when they were ratified by the U.S. Senate. These conventions focus on the protection of civilians and prisoners of war during military conflicts.
Step-by-step explanation:
The Geneva Conventions are a series of treaties and protocols that establish international standards for humanitarian treatment during war. The first Geneva Convention was signed in 1864, but the versions most relevant today were established in the aftermath of World War II. In reference to the United States, the Geneva Conventions, particularly the four treaties established in 1949, came into force on February 2, 1956, after being ratified by the U.S. Senate. Therefore, the correct answer to the question of when the Geneva Convention came into force for the United States is 1955, as the United States officially adopted them on this date.
The Geneva Conventions are primarily concerned with the protection of civilians and prisoners of war during military conflicts. They aim to ensure the humane treatment of all individuals who are not actively participating in the hostilities, including the sick and wounded, shipwrecked sailors, prisoners of war, and civilians.