The 38th (Irish) Brigade, is a brigade formation of the British Army that served in the Second World War. It was composed of North Irish line infantry regiments and served with distinction in the Tunisian and Italian Campaigns. Following the end of the war, the brigade was disbanded, but was reformed in sixty years later in 2007 and remains the regional formation for Northern Ireland.

The 1st Division was an infantry division of the British Army that was formed and disestablished numerous times between 1809 and the present. It was raised by Lieutenant-General Arthur Wellesley for service in the Peninsular War. It was disestablished in 1814 but re-formed the following year for service in the War of the Seventh Coalition and fought at the Battle of Waterloo. It remained active in France until 1818, when it was disbanded. It was subsequently raised for service in the Crimean War, the Anglo-Zulu War, and the Second Boer War. In 1902, it was re-raised in the UK. This latter event saw the division raised as a permanent formation, rather than being formed on an ad hoc basis for any particular crisis.