93rd Heavy Anti-Aircraft Regiment, Royal Artillery was a volunteer air defence unit of Britain's Territorial Army (TA) formed in Cheshire just before the outbreak of World War I.

After Munich, the TA was doubled in size, and on 1 April 1939, 267 (Wirral) AA Bty provided the cadre for a new 93rd Anti-Aircraft Regiment.

Behrend, and among the new officers appointed to the unit on 15 April 1939 was Second lieutenant Howard Erskine Johnston; he later commanded 103rd HAA Rgt and an AA Assault Group at the D-Day landings.

[10] During the period of the Phoney War, the AA defences of NW England were not tested in action, and the time was spent in equipping and training the TA units.

[2][5] By the start of the Battle of Britain, in July 1940, the number of HAA guns deployed in the Liverpool GDA had reached 52.

[2][24][25][26] During 1940 a British force had occupied the Danish Faroe Islands to prevent the Germans using them as a base for attacks on the North Atlantic convoys.

The first LAA detachments arrived in July 1941 and immediately came under attack from long-range Junkers Ju 88 bombers based in Norway.

The battery had two GL Mk II gun-laying radar sets and a semi-automatic plotter that gave the guns the ability to engage unseen targets in cloud or at night, there being no searchlights available.

Although the HAA guns fired three or four times in a typical month, often causing the targets to take evasive action, there were no confirmed 'kills'.

[31][32] 93rd HAA Regiment, with 267, 288 and 289 Btys under command, arrived by May 1943 and joined 2 AA Bde in Middle East Forces (MEF).

The Middle East AA Group still had considerable commitments in the Levant, in Egypt, and along the North African Coast.

It was also preparing to provide AA cover for Operation Hercules, a planned landing on Rhodes following the failure of the Dodecanese Campaign, and aimed at getting Turkey into the war.

[36][37] By now, the air threat to the Middle East bases was low and by July 1944 AA manpower was being diverted to other tasks.