Assertion: tank | /r/CapableOf | head the kpa columns
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text: During the initial hours of warfare, some under-equipped ROK Army border units used 105 mm howitzers as anti-tank guns to stop the tanks heading the KPA columns, firing high-explosive anti-tank ammunition (HEAT) over open sights to good effect; at the war's start, the ROK Army had 91 such guns, but lost most to the invaders.