Editing High-explosive squash head (section)

== History ==
HESH was developed by [[Dennistoun Burney]] in the 1940s for the British war effort, originally as an anti-[[bunker|fortification]] "wallbuster" munition for use against concrete. He also led British developments in [[recoilless rifle]]s as a means to deliver the shell. An early application of the HESH principle post WWII was the  [[Royal Ordnance L9|L9 165 mm demolition gun]] fitted to [[Armoured Vehicle Royal Engineers|AVRE]] combat engineer vehicles.<ref>{{Cite book|last=Edgerton|first=David|url=https://www.worldcat.org/oclc/761379325|title=Britain's war machine : weapons, resources and experts in the Second World War |at=Chapter-8 Boffins |date=2012|publisher=Penguin|isbn=978-0-14-102610-7|location=London|oclc=761379325}}</ref>

HESH was found to be surprisingly effective against metallic armour as well as concrete structures. It was widely used as a primary round in most large calibre rifled guns.