1st Brigade, 3rd Infantry Division:

The division fought in France in World War I. In World War II, it landed with Gen. Patton's task force in a contested amphibious landing on the coast of Morocco, North Africa, overwhelming Vichy French defenders in November 1942. In 1943, the division invaded Sicily in July, and invaded Italy at Salerno in September, before fighting in France and finally Germany. Medal of Honor recipient Audie Murphy, featured in the Hollywood movie, "To Hell and Back," was a member. The division also served in the Korean War. From 1957 until 1996, the division was a major part of the United States Army's presence in the NATO alliance in West Germany.

In November 1990, following Iraq's invasion of Kuwait, more than 6,000 3rd Infantry Division men and women deployed with the 1st Armored Division on Operation Desert Storm as part of the Allied Coalition. They participated in the Battle of Medina Ridge which was the largest tank battle of the conflict.

Early in 2003 the entire division deployed in weeks to Kuwait. It was called on subsequently to spearhead Coalition forces in Operation Iraqi Freedom, fighting its way to Baghdad in early April, leading to the end of the Saddam Hussein government. The First Brigade captured the Baghdad International Airport and cleared and secured the airport, which also resulted in the division's first Medal of Honor since the Korean War, awarded to SFC Paul Ray Smith. The division returned to the United States in September 2003.

Order of Battle during 2003 invasion:

1st Brigade

2nd BN, 7th Infantry Regiment (Mech)
3rd BN, 7th Infantry Regiment (Mech)
3rd BN, 69th Armor Regiment
1st BN, 41st Field Artillery Regiment (155SP)

In the fall of 2008, the 3rd Infantry Division's 1st Brigade was assigned to serve as the on-call federal response force under the control of NORTHCOM, the combatant command assigned responsibility for the continental United States. The brigade remained at its home station of Fort Stewart, Georgia, and "is training to deploy domestically in response to terrorist attacks or other national emergencies." The brigade will be trained in responding to WMD attacks, crowd control, and dealing with civil unrest.

3ID's Wiki - History[en.wikipedia.org]
ArmA 3 Unit Page[units.arma3.com]