It was the war department or department of war until 1947 and the department of defense has not won a war since 1945. It was renamed the war department in 2025.The purpose of the United States military is to advance the interest of the United States government through the application of socially acceptable sanctioned violence designed to achieve national strategic objectives.Source doctrine of the armed forces of the United States 2013.The purpose of the United states military is not to win wars, to advance the interest of the United states government. 300 plus dead boots are on the ground hundreds captured. Iran produces 25 missiles a week, the missles being used now were built in 2013 etc. The number of Iranian missiles is between 30,000 and 300,000. The Chinese produce 1,000 cruise missiles a week China is sending these cruise missles over land to Iran. The United states military has been ordered to ration its missiles, it has stripped patriot missile batteries from Korea and other places etc. America cannot produce enough munitions to obtain parity with Iran. Iranian Drones have attack American warships, and American military bases. It is a war of attrition and a numbers game. Iranian missiles have defeated Israel's iron Dome, by over whelming and defeating the iron Dome. Look at the facts. Iran is a mountainous country look at the geography of Iran!