The first combat use was at El Alamein, which expended all the HE ammunition in the theatre.
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At peak artillery strength in 1965–1966 there were six batteries (two from the Royal Malaysian Artillery) of 105mm Pack Howitzer, half a battery of 5.5-in Guns and a section of 4.2 in Mortars operated by men detached from the light air defence battery defending Kuching airport.