Every year on June 14th, the United States Army celebrates its creation in 1775.

Formed from amateur troops of volunteer soldiers defending colonies against British tyranny, the oldest military force in the United States began before the U.S. formally existed. Their forces consisted of mostly inexperienced militiamen commanded by independent colonial armies.

According to resources, there were never more than 48,000 Continental soldiers at one time.  Today, the United States Army consists of over one million active-duty service members and an additional 800,000 National Guard and Reserves members.  It is the largest branch in the U.S. military.

The enduring history of the U.S. Army means it has been integral to many of the United States military, peace-keeping, and humanitarian efforts. It has operated or helped to facilitate humanitarian operations in many other countries and provided civil engineering and modernization projects in nations that need certain types of infrastructure.

The evolution of the U.S. Army also has included changes in the demographics of those who serve; from an exclusively male active-duty force to a diverse and multicultural force that is far more representative of the American population than in previous decades.