102nd (Ulster) Heavy Anti-Aircraft Regiment, Royal Artillery

The 102nd Heavy Anti-Aircraft Regiment, Royal Artillery was a North Irish air defence unit of Britain's Territorial Army (TA) raised in Antrim, Northern Ireland during the the period of international tension leading up to the outbreak of World War II. It defended northern Northern Ireland. The regiment continued to serve until 1943 when it was moved to the Middle East and served in the North African Campaign before being placed in suspended animation. When the TA was reformed the next year, the regiment was reformed yet disbanded in 1955 following the concurrently disbandment of Anti-Aircraft Command (AA Command).

Origins
The Territorial Army was rapidly expanded following the Munich Crisis, particularly the Anti-Aircraft (AA) branch of the Royal Artillery (RA). The 102nd Anti-Aircraft Regiment, RA was one of these many new units formed in the spring on 1939. By September 1939 the regiment was organised as follows;


 * Regimental Headquarters & Headquarters Battery, Antrim
 * 314th AA Battery, Antrim
 * 315th AA Battery, Antrim
 * 316th AA Battery, Antrim

Following formation the regiment was assigned to Northern Ireland District and designated as a Supplementary Reserve (SR) regiment due to traditions of no TA units being based in Northern Ireland. Throughout the entire AA branch of the RA, there were 850 HAA and 510 LAA guns based throughout the United Kingdom available.