On 12 August 1914 he was promoted to captain .
With the outbreak of the First World War , Collett joined the British Army and was posted to the 5th Battalion of the Gloucestershire Regiment .
On 12 August 1914 Collett was promoted to captain .
With the outbreak of the First World War , Collett joined the British Army and was posted to the 5th Battalion of the Gloucestershire Regiment .