On 21–22 July 1916, Brownell was in action with his battery at Pozières, during which the unit was subject to severe German shellfire. Throughout the engagement, Brownell established and maintained communications between the battery and firing line, despite fatigue or personal risk to himself. Commended for his "particularly meritorious service ... and ... gallantry in this work", Brownell was subsequently recommended for the Military Medal. The notification for the award was published in a supplement to the "London Gazette" on 16 November 1916.