tracks, and over 100000 mi of telephone and telegraph lines.

The first American troops, who were often called "Doughboys," landed in Europe in June 1917. The AEF did not participate at the front until October 23, 1917, when the 1st Division fired the first American shell of the war toward German lines, although they participated only on a small scale. A group of regular soldiers and the first American division to arrive in France, entered