The U.S. Army has always been the backbone of the military, with over 25 million soldiers serving in all U.S. wars.  Many veterans of the army might have been in artillery or cavalry but the majority served as infantry, with  77 divisions of infantry being mobilized during WWII alone.  But, as history has shown, it can sometimes take such huge amounts of manpower to win a war and the army has always been there to provide it..  Army veterans, it would follow, make up the largest community of any ex-members of any military branch.

Because of the size and complexity of an organizational unit such as this, the U.S. Army has produced great leaders within its ranks.  Names like Washington, Jackson, Harrison, Grant, Theodore Roosevelt, and Eisenhower eventually rose to the top as leaders in the army and these are the same ones who eventually turned their positions into presidencies.  Who knows how many more future presidents will come from the many army veterans alive now.