 Complete the following phrase:  In July 1916, they were committed to the Battle of Pozières, after which the brigade was moved to Belgium before returning to the Somme. In May 1917, as the Germans withdrew to the Hindenburg Line, the brigade took part in the Battle of Lagnicourt in April 1917 and then the Second Battle of Bullecourt in May. Later in the year they were heavily committed, joining actions at Menin Road in September 1917 and Pelcappelle in October. In early 1918, the Germans launched the Spring Offensive, during which the 5th Brigade fought a series of defensive actions in the Somme Valley, before taking part in the 