Editing M1 helmet (section)

{{Short description|American combat helmet}}
{{Infobox military gear
| name               = M1 helmet
| image              = M1helmetshell.jpg
| alt                =
| caption            = View of an M1 helmet shell
| origin             = United States
| type               = [[Combat helmet]]
<!-- Service history -->
| service            = 1941–1986 (US)
| used_by            = See ''[[#Users|Users]]'' for details
| wars               = [[World War II]]<br/>[[Chinese Civil War]]<br/>[[Korean War]]<br/>[[Hukbalahap Rebellion]]<br/>[[Civil conflict in the Philippines]]<br/>[[Indonesian National Revolution]]<br/>[[First Indochina War]]<br/>[[Vietnam War]]<br/>[[Football War]]<br/>[[Cambodian Civil War]]<br/>[[Laotian Civil War]]<br>[[Sino-Vietnamese War]]<br/>[[Internal conflict in Myanmar]]<br/>[[Cuban Revolution]]<br/>[[Portuguese Colonial War]]<br/>[[Congo Crisis]]<br/>[[Nigerian Civil War]]<br/>[[South African Border War]]<br/>[[Somali Civil War]]<br/>[[Ethiopian Civil War]]<br/>[[Ogaden War]]<br/>[[Eritrean War of Independence]]<br/>[[Western Sahara War]]<br/>[[Algerian War]]<br/>[[Suez Crisis]]<br/>[[Six-Day War]]<br/>[[War of Attrition]]<br/>[[Yom Kippur War]]<br/>[[Black September]]<br/>[[1982 Lebanon War]]<br/>[[Lebanese Civil War]]<br/>[[Iran-Iraq War]]<br/>[[Indo-Pakistani War of 1965]]<br/>[[Indo-Pakistani War of 1971]]<br/>[[Turkish invasion of Cyprus]]<br/>[[Dominican Civil War]]<br/>[[Guatemalan Civil War]]<br/>[[Salvadoran Civil War]]<br/>[[Nicaraguan Revolution]]<br/>[[Colombian conflict]]<br/>[[Internal conflict in Peru]]<br/>[[Falklands War]]<br/>[[United States invasion of Grenada]]<br/>[[United States invasion of Panama]]<br/>[[Gulf War]]<br/>[[Croatian War of Independence]]<br/>[[Bosnian War]]<br/>[[Insurgency in Khyber Pakhtunkhwa]]
<!-- Production history -->
| designer           = Major Harold G. Sydenham<ref name="OD">{{cite web|url=http://olive-drab.com/od_soldiers_gear_m1_helmet.php|title=M-1 Steel Helmet}}</ref>
| design_date        = 
| manufacturer       = McCord Radiator and Manufacturing Company and Schlueter Manufacturing Company<ref name="Maker">{{cite web|url=http://nuke.combat-helmets.com/WorldWarII/USA/SchlueterVsMcCord/tabid/288/Default.aspx|title=Schlueter Vs McCord|last=COMBAT-HELMETS|website=nuke.combat-helmets.com}}</ref><br/>Ulbrichts Witwe 
| unit_cost          = 
| production_date    = 
| number             = 22 million (1945)<ref name="Maker"/>
| variants           =
<!-- General specifications -->
| spec_label         = 
| weight             = 
| length             = 
| width              = 
| height             = 
| diameter           = 
}}

The '''M1 helmet''' is a [[combat helmet]] that was used by the [[United States Armed Forces]] from 1941 to 1986. Designed to replace the [[Brodie helmet#United States|M1917 helmet]], a [[British Empire|British]] design used during [[World War I]], the M1 helmet is known for having been used as the primary American combat headgear during [[World War II]], with similarly extensive use in the [[Korean War]] and the [[Vietnam War]]. Owing to its extensive use throughout World War II and the [[Cold War]], the M1 helmet has become an icon of the U.S. military, with its design inspiring copies and derivative designs used by other militaries around the world.

In 1986, the M1 helmet, by then greatly outdated for the changing needs of modern warfare, was succeeded in U.S. military service by the [[Personnel Armor System for Ground Troops#Helmet|PASGT helmet]], another similarly iconic and influential combat helmet design. Some M1 helmets and their derivatives remain in service with several national militaries in the 21st century, although most have been relegated to being part of certain ceremonial uniforms, such as those of [[honor guards]].