56th Brigade was moved in to reinforce Third Army before the launch of the German Spring Offensive. After the German breakthrough 220th Siege Bty supported the retreating troops, finding ammunition where it could. Eventually the brigade rallied behind Amiens. It returned to the line with Third Army and took part in the Hundred Days advance at the Battles of Albert, Bapaume and Cambrai, followed by the crossing of the Sambre. Even 220th Siege Bty's lighter 6-inch howitzers could not keep up in the final days of the advance. The battery went to Germany as part of the British Army of the Rhine after the Armistice, where it was disbanded in 1919.