He used a wide variety of guns, including the culverin, demiculverin, falconet and Saker. The more important types included the Demi-cannon, the Culverin and Demi-culverin, and the Carronade. Overall, the culverin was a significant advance. In 1943, an invasion of Sumatra, codenamed Operation "Culverin", was tentatively planned. He was killed by a culverin shot while besieging La Rochelle. The culverin was used to bombard targets from a distance. The Culverin was an opposed-piston two-stroke design. The name is derived from the French word, culverin, for an early cannon or musket. The culverin was also common in 15th century battles, particularly among Burgundian armies. The culverin was fired by inserting a burning slow match into the hole. In the 17th century Dutch culverin were incorporated as well and became known as hongyipao. Another four were cancelled on 23 December 1945 - "Carronade", "Culverin", "Cutlass" and "Rifle".