[2] As a 20-year-old private in the 10th Service Battalion, The King's Own Yorkshire Light Infantry, British Army during the First World War, Waller was awarded a Victoria Cross for his valiant actions on 10 April 1917 south of Heninel, France.

During the day, Waller continued for more than an hour to throw bombs and held off enemy attack.

[3] For most conspicuous bravery when with a bombing section forming a block in the enemy line.

A very violent counter-attack was made by the enemy on this post, and although five of the garrison were killed, Pte.

Waller, who, although wounded later, continued to throw bombs for another half an hour until he was killed.