While they battled on in those theatres the 1st and 2nd joined the Guards Armoured Division, with the 1st Battalion being infantry, assigned to the 32nd Guards Brigade, and the 2nd Battalion being armoured, part of the 6th Guards Armoured Brigade. The two battalions worked closely, being the first troops to re-enter Brussels on 3 September 1944 after an advance of 100 miles in one day in what was described as 'an armoured lash unequalled for speed in this or any other war' led by Major-General Sir Allan Henry Adair, the divisional commander.