Editing High-explosive squash head (section)

{{Short description|Ammunition type}}
{{Multiple image
| total_width = 230
| header = High explosive squash head<br/>(HESH)
| image1 = 120MM HESH Round.jpg
| caption1 = Cross section of a 120 mm HESH round from the [[Arjun (tank)|Arjun]] [[main battle tank]]
}}

A '''high-explosive squash head''' ('''HESH'''), in British terminology, or a '''high-explosive plastic/plasticized''' ('''HEP'''), in American terminology,<ref>{{Cite web|title=Explosive_weapon_effects_web.pdf|url=https://www.gichd.org/fileadmin/GICHD-resources/rec-documents/Explosive_weapon_effects_web.pdf|access-date=2021-10-10|website=gichd.org|page=22|archive-date=2023-03-15|archive-url=https://web.archive.org/web/20230315005137/https://www.gichd.org/fileadmin/GICHD-resources/rec-documents/Explosive_weapon_effects_web.pdf|url-status=dead}}</ref> is a type of [[explosive]] [[projectile]] with plastic explosive that conforms to the surface of a target before detonating, which improves the transfer of explosive energy to the target. Squash head projectiles are similar to high-explosive projectiles and are well suited to many of the same targets. However, while HESH projectiles are not armour-piercing, they can defeat armored targets by causing [[spall]], which can injure or kill a vehicle's occupants or detonate some types of ammunition.<ref name=":0"/>