By June/July 1943 10th HAA Rgt formed part of a large AA concentration protecting the build-up of forces in Malta for the Allied invasion of Sicily (Operation Husky), with 191 HAA Bty deployed at XHD17M (Ta Ġiorni, 3 x static 3.7-inch Mk II) and XHE28 (Spinola, 3 x static 4.5-inch Mk I, GL Mk I).