A majority of America’s presidents came to office as Veterans. Twenty-six of our 44 Presidents served in the military. Presidential Veterans often coincided with America’s military engagements. Until World War II, a majority of our presidents had served in the Army. Since then, most have served in the Navy. Our ninth President, William Henry Harrison, embarked on his military career at age 18, enlisting 80 men off the streets of Philadelphia to serve in the Northwest Territory.