 In mid-June, the brigade entered the front line for the first time, moving into a sector near Petillon, in France, relieving the 3rd Brigade.The brigade remained along the front for several weeks; although it was relatively quiet, the tour, which lasted until the night of 10/11 July, cost the brigade 41 casualties.After being relieved by the 15th Brigade, the 13th moved to Halloy-les-Pernois, to the west of Pozieres to under take further training, including route marches and attacks in concert with artillery to prepare them for entry into the Somme offensive, which had begun on 1 July.