The armies in Italy called in AA units progressively from North Africa as their defensive commitments grew. 64th (Northumbrian) HAA Rgt landed with 25 AA Bde in late December 1943. Two of its batteries (16 x 3.7-inch guns) were sent to Bari, where the air defences were being strengthened after the disastrous Air raid on Bari of 2 December, while 268 HAA Bty (8 x 3.7-inch) went to Barletta. Bari continued to attract "Luftwaffe" attention, particularly night raids accompanied by 'Window' to jam radar. The HAA batteries' GL Mk II gunlaying radar was least affected, and their sets were used to direct searchlights as well. 25 AA Brigade also set up a decoy site outside Bari and stationed some of its guns there to attract bombers away from the vital port.