How many people served in the army in World War 1?

How many Japanese died from the nuke? How did life on the home front change in World War 1? How many years did a man serve in the army after being drafted for World War 2? What was the name of the fort near socorro named and what was the name of the battle for that fort called? What policy did the US return to after World War 1 and before World war two? Cause and effect of Mexican war? What U-boat was the most successful submarine of World War 1 sinking 223 ships? How were knights trained? What key strategy was used by the US against the Japanese in the Pacific in order to retake territory? The cold war was waged because? What is the name of the potical parties that emerged in 1797? Who won the battle of d day? Where was the US Constitution located during World War 2? What are the countries on the either side of the US? What type of sicknesses were common during world war 2? How far did the cold war extend? Why did men wear hats? Which country took over Vietnam during world war 2? How did the economy of the South during the Antebellum era compare to that of the North? How much money did the wright make when they sold their first airplane to the US army?