The 143rd Infantry Brigade was an infantry brigade of the British Army that saw active service in both the First and the Second World Wars. In the First World War the brigade served on both Western Front and later the Italian Front. During the Second World War the brigade fought in Belgium and France before being evacuated to England where it remained for the rest of the war and was finally disbanded in 1946. Raised again in the 1980s, this brigade disbanded under Army 2020 in November 2014.