[2] It made advances of 1,200 yards at the beginning of the Battle of Neuve Chapelle in March 1915 before the momentum died out.

The First Army took part in the 1918 offensive that drove the Germans back and virtually ended the war.

The First Army headquarters was formally activated on 9 November 1942 when Anderson arrived in Algiers to assume command of the redesignated Eastern Task Force.

By the time General Sir Bernard Montgomery's British Eighth Army approached the Tunisian border from the east, following its long pursuit of Generalfeldmarschall Erwin Rommel's forces after El Alamein, the First Army was again ready to strike.

242 Group RAF, the First Army carried the main weight of General Sir Harold Alexander's 18th Army Group's offensive to conclude the Tunisian Campaign and finish Axis forces in North Africa off.