The 4th Infantry Regiment, formerly the 4th Auxiliary Regiment is a reserve unit within the Adammic Army in the Empire of Adammia. It is currently stationed in Cornwall, and is commanded by Colonel Sir Richard Hytholoday.
The regiment was first founded on 14 September 2015 as an auxiliary regiment of the 2nd Infantry Division, then responsible for defending Borealia; the regiment was, at the time, stationed in East Devon several miles from Borealia and was commanded by Colonel Cameron Birch. After Borealia became independent and transformed into the Mohawk Empire in August 2016, the 2nd Infantry Division dissolved and the regiment fell under the direct control of High Command. On 15 January 2017, the regiment was moved to Cornwall and Colonel Hytholoday took over as the commanding officer, with Birch being fired from the Army for inactivity. On 30 June 2018, the unit was assigned to the expeditionary 3rd Infantry Division, before being reassigned to the Adammic Army Reserves on 21 January 2019.