The battalion's first actions were at the Battle of Arras (1917) and included the disastrous Bullecourt operation in April 1917. The 3rd Tank Brigade was formed under his command on 27 April 1917 and Hardress-Lloyd remained in charge of this brigade until the war ended.
The battalion's initial efforts were at the Battle of Arras (1917) and included a disastrous operation, the Bullecourt incident, in April 1917. The 3rd Tank Brigade was established under his leadership on 27 April 1917, and Hardress-Lloyd continued to lead this brigade until the conclusion of the war.