 However, once America entered the war in 1917, Denver contributed what it could to the war effort.Clothing and supplies were donated, children enrolled in agricultural and garden clubs to free up young men for the war, and mining and agricultural interests were expanded to support the troops and the nation.As prices for goods rose with the demand from the war effort farmers began planting crops in greater numbers and mining companies opened new mines for molybdenum, vanadium, and tungsten.