Complex sentence: Four Japanese 37 mm anti-tank guns opened fire on the tanks, destroying or disabling three of them and several of the tank's crewmembers were bayoneted and killed by the Japanese.
Split into simpler sentences: Four Japanese 37 mm anti-tank guns opened fire on the tanks, destroying or disabling three of them. Several of the disabled tank's crewmembers were bayoneted and killed by the Japanese.