JHQ Rheindahlen was a military base in Mönchengladbach, North Rhine-Westphalia, Germany active from 1954 to 2013. It functioned as the main headquarters for British forces in Germany and for the NATO Northern Army Group. Latterly it was also known as the Rheindahlen Military Complex, part of Rheindahlen Garrison. It was named after the local village of Rheindahlen, part of the city borough of Mönchengladbach.

British Forces Germany (BFG) was the generic name for the three services of the British Armed Forces, made up of service personnel, UK Civil Servants, and dependents, based in Germany. It was established following the Second World War, the largest parts of it becoming known as the British Army of the Rhine (BAOR) and RAF Germany (RAFG). Both components had the mission of defending West Germany and remained there for the rest of the Cold War.