The British Army Camp at Cwrt-y-Gollen was taken over in late 1943 by US Army for 248th Field Artillery Battalion, part of the 177th Artillery Group. A small airstrip was developed in fields to the northwest of the Battalions four L4 Air Observation Post aircraft (see NPRN 415438). More American units passed through in the build up to D-Day landings - 174th, 991st, 87th. and 258th. Although many of the buildings have subsequently been demolished, the site remains a headquarters for the Land Command Cadets and the OTC branch of the army.

The camp was redeveloped in the 1960s. 'When the Regimental Depot at Wrexham closed in 1960, recruit training for the three Welsh regiments was transferred to Cwrt-y-Gollen Camp, near Crickhowell. Following a major rebuild HM The Queen opened the new camp in the presence of the Colonels of the three Welsh regiments with representative detachments from each. Cwrt-y-Gollen was closed in 1986.' [source: Royal Welch Fusiliers Museum Facebook post 10/05/2020]

The camp features a striking C20th gatehouse; see NPRN 801277.

Sources include:
Jones, I, 2007, Airfields and Landing Grounds of Wales: West, pg20
Recorded by RCAHMW aerial reconnaissance.

RCAHMW, November 2011. Updated by Toby Driver, RCAHMW, January 2025