225th Infantry Regiment (United States)

The Detroit Light Guard is a military formation in the United States Army, Michigan Army National Guard that has served in many functions since its creation in 1830, including state duties, and even overseas combat. It is survived today in the US Army's 1225th Corps Support Battalion. The Light Guard's nickname, the "Tigers," is the origin of the name of the Detroit Tigers baseball team.

The Detroit Light Guard was first organized in 1830–31 in the Michigan Militia in the city of Detroit, and was known as the Detroit City Guard. On 24 May 1832, the Guards were mobilized for federal service for the first time. They joined the 1st Michigan Militia Regiment and served as a company under CPT Isaac S. Rowland. They joined a force of Army Regulars and militia to defeat the Sauk and Fox Indians in the Black Hawk War in Wisconsin, effectively ending Native American resistance in the Great Lakes region. The troops never saw combat, however. Exposure and the hardship of the march to the Mississippi River, coupled with an outbreak of cholera, took a heavy toll. Sickness and some deaths were reported. The militia unit was reorganized on 13 April 1836 as the Brady Guards under the command of CPT Rowland, and was recalled for federal service on 6 December 1838 to help state and federal authorities maintain order in the aftermath of conflict along the US-Canada border in the Patriot War. They were mustered out on 22 February 1839, only to be reactivated on 1 March. They were soon mustered out on 31 May 1839.

The Brady Guards were reactivated for federal service during the Mexican-American War on 4 December 1847, where they joined with other militia companies to form the 1st Michigan Volunteer Infantry Regiment. The men were sent to garrison the various forts in the area to enable Regular Army units to move to the fight in Mexico. On 29 July 1848, the regiment was demobilized in Detroit. On 16 November 1855, the Brady Guards regained the name of the Detroit Light Guard and continued to serve state duty.