1st Marine Division

1st Marine Division
Founded	1 February 1941
Country	United States
Branch	United States Marine Corps
Type	Ground combat element
Size	Division (approximately 22,000)[1]
Part of	I Marine Expeditionary Force
Garrison/HQ	Marine Corps Base Camp Pendleton
Nickname(s)	The Old Breed Blue Diamond
Motto(s)	No Better Friend, No Worse Enemy
March	"Waltzing Matilda"
Engagements	Banana Wars Occupation of Veracruz, Mexico (1914) Occupation of Haiti (1915–1934) Occupation of the Dominican Republic (1916–24) Occupation of Cuba (1917–22) World War I (5th Marines) Western Front German spring offensive Battle of Belleau Wood Battle of Soissons Hundred Days Offensive Battle of Saint-Mihiel Battle of Blanc Mont Ridge Meuse-Argonne offensive World War II Pacific War Solomon Islands campaign Guadalcanal Campaign Battle of Tulagi and Gavutu–Tanambogo Battle of the Tenaru Battle of Edson's Ridge Second and Third Battles of the Matanikau Battle for Henderson Field Matanikau Offensive Koli Point action New Britain campaign Battle of Cape Gloucester Battle of Talasea Mariana and Palau Islands campaign Battle of Peleliu Volcano and Ryukyu Islands campaign Battle of Okinawa Chinese Civil War Operation Beleaguer Korean War Battle of Pusan Perimeter Battle of Masan First Battle of Naktong Bulge Second Battle of Naktong Bulge Battle of Inchon Second Battle of Seoul Battle of Chosin Reservoir First and Second Battles of Wonju Battle of Hwacheon Battle of the Punchbowl Battle of Bunker Hill (1952) First Battle of the Hook Battle for Outpost Vegas Battle of the Samichon River Cold War Cuban Missile Crisis Vietnam War Operation Starlite Operation Piranha Operation Oregon Operation Hastings Operation Medina Operation Kentucky Operation Union Operation Union II Operation Swift Operation Allen Brook Tet Offensive Battle of Khe Sanh Battle of Kham Duc Operation Auburn Operation Badger Tooth Operation Napoleon/Saline Battle of Huế Operation Scotland II Operation Mameluke Thrust Operation Imperial Lake Nicaraguan Revolution Operation Golden Pheasant Gulf War Battle of Khafji Battle of Kuwait International Airport Liberation of Kuwait Operation Garden Plot 1992 Los Angeles riots Somali Civil War Operation Restore Hope Operation United Shield 1999 East Timorese crisis International Force East Timor Global War on Terrorism Iraq War Invasion of Iraq Battle of Umm Qasr Battle of Al Faw (2003) Battle of Nasiriyah Battle of Al Kut (2003) Battle of Hillah (2003) Battle of Baghdad Anbar campaign (2003–2011) 2004 Iraq spring fighting First Battle of Fallujah Battle of Ramadi (2004) Battle of Husaybah (2004) Battle of Najaf (2004) Second Battle of Fallujah Operation Steel Curtain Battle of Ramadi (2006) Battle of Donkey Island Operation Phantom Thunder Operation Alljah Operation Arbead II Operation Mawtini War in Afghanistan (2001–2021) United States invasion of Afghanistan Fall of Kandahar Battle of Shewan Battle of Nawzad Helmand province campaign Battle of Dahaneh Battle of Garmsir Operation Strike of the Sword Operation Moshtarak Battle of Sangin (2010) War against the Islamic State Operation Inherent Resolve
Commanders
Commander	MajGen Benjamin T. Watson
Notable commanders	Holland Smith Alexander Vandegrift William H. Rupertus Oliver P. Smith James M. Masters, Sr. Edwin A. Pollock Herman Nickerson Jr. James Mattis Pedro Del Valle Robert O. Bare Edward W. Snedeker Frank Libutti Lawrence D. Nicholson

The 1st Marine Division (1st MARDIV) is a Marine division of the United States Marine Corps headquartered at Marine Corps Base Camp Pendleton, California. It is the ground combat element of the I Marine Expeditionary Force (I MEF).

It is the oldest and largest active duty division in the United States Marine Corps, representing a combat-ready force of 22,000 personnel. It is one of three active duty divisions in the Marine Corps today and is a multi-role, expeditionary ground combat force. It is nicknamed "The Old Breed".