Arriving in Marseilles, France, Maxwell was admitted to 7th Australian Field Ambulance and then transferred to the 3rd Canadian General Hospital following wounds sustained during battle. He was moved to the 1st Convalescent Depot on 2 May, and then discharged to Base Details eleven days later. He was later found guilty of breaking ranks at the 07:30 parade on the same day and being absent without leave from 08:00 until 13:00 on 24 May; for this transgression, he was reduced to the ranks. Rejoining his battalion on 1 June, he took part in the Battle of Pozières and received a promotion to sergeant in October.