Ammunition boots, also known as Boots, General Service (BGS), were the standard footwear for the British Army from the late 1880s until the late 1950s. They replaced the earlier lace-up "Blucher" boots that had been in service since the early 1800s.

The term "Ammunition boots" comes from the boots' unusual source. They were procured by the Master Gunner and the Munitions Board at Woolwich (the Regiment of Artillery's headquarters) rather than Horse Guards (the headquarters of the British Army). They were usually produced at a factory on site, but civilian manufacturers were given contracts to produce them during times of increased demand.

Ammunition boots were unlined ankle-boots with leather laces, "pebble-grained" (dimpled) leather vamp (front) and quarters (sides), smooth leather toe case (toe cap) and counter (heel cap), iron heel-plate and toe-plate, and an iron-studded leather sole. They were designed to be hard-wearing and long-lasting rather than comfortable. The hobnail-studded soles made a loud crunching sound when the wearer was marching, earning them the nickname "crunchies".