The 10th Battalion crossed to England on 6 August, completed its mobilisation at Pirbright and went to France on 18 August, joining 63rd (Royal Naval) Division. You can follow the month by month history of the 10th Battalion from War Diaries and other sources
The Battle of the Ancre in Nov 1916. was its first major action and it suffered 50% casualties (dead, wounded and missing)
Transferred to 48th Brigade in 16th (Irish) Division on 23 June 1917.