A Great War Military Medal group of three awarded to 830509 Gunner W.J. Bayes of the B/306 Brigade, Royal Field Artillery. 

The Military Medal was awarded for acts of gallantry and bravery in the field during active operations against the enemy.

1. The British War Medal was awarded to all members of the British armed forces who served during the First World War.
2. The Victory Medal was awarded to all members of the British armed forces who served during the First World War.

Gunner W.J. Bayes of the B/306 Brigade, Royal Field Artillery was awarded the Military Medal for his bravery in the field during the Great War. The specific actions for which the medal was awarded may be recorded in official documents, such as the London Gazette. The value of a specific medal group will depend on factors such as the recipient's military service history, the condition of the medals, and any accompanying paperwork or documents.