It was reduced and consolidated on 11 May 1907 with the 2nd Infantry Regiment, California National Guard (organized in 1864 as the Sacramento Light Artillery) to form the 2nd Infantry Regiment, California National Guard, with headquarters at Sacramento.

The 184th Infantry Infantry was constituted in the National Guard in 1921, assigned to the 40th Division, and allotted to California; the regiment was reorganized in the California National Guard and the headquarters was federally recognized on 20 October 1924 at Sacramento.

The regiment trained there for over a year as part of the 40th Division before relocating to Fort Lewis, Washington, on 29 April 1942.

The regiment stayed in Hawaii where it trained in jungle warfare for over a year before being moved forward during January 1944 to the Solomon Islands.

The regiment participated in various actions of the Philippines Campaign of 1944–45 during the rest of the war, and arrived back at San Francisco, California on 5 April 1946, being inactivated the next day.

The 185th was no different with the regiment activated for Operation Noble Eagle, when it was assigned to guard military bases, airports, and other possible targets of opportunity.

Specialist Sellen, posthumously promoted to sergeant, was killed while attached to 16th MP Brigade due to an accidental discharge of a firearm by a fellow soldier.

After completing training at Fort Dix, New Jersey, the company moved to Camp Slayer in Baghdad, Iraq and conducted force protection, convoy security, and military police missions throughout the country.

[19] The company received a Meritorious Unit Commendation for their service pursuant to Department of the Army Permanent Orders 272-43 dated 29 September 2009.