 Complete the following phrase:  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 