The Welsh Guards, part of the Guards Division, is one of the Foot Guards regiments of the British Army. It was founded in 1915 as a single-battalion regiment, during the First World War, by Royal Warrant of George V. Shortly after the regiment's formation, it was deployed to France where it took part in the fighting on the Western Front until the end of the war in November 1918. During the inter-war years, the regiment undertook garrison duties in the United Kingdom, except between 1929 and 1930 when it deployed to Egypt, and late 1939 when it deployed to Gibraltar.

In some militaries, foot guards are senior infantry regiments. Foot guards are commonly responsible for guarding royal families or other state leaders, and they also often perform ceremonial duties accordingly, but at the same time are combat soldiers.