Complex sentence: With the outbreak of World War I in August 1914, Archer-Shee returned to Britain and was commissioned in the British Army as a second lieutenant in the 1st Battalion, South Staffordshire Regiment.
Split into simpler sentences: With the outbreak of World War I in August 1914, Archer-Shee returned to Britain and enlisted in the British Army. He was commissioned as a second lieutenant in the 1st Battalion, South Staffordshire Regiment.