Signs of the attacks are still visible today in collapsed buildings and bullet holes in walls in Fallujah, a Iraqi city exploded against US invasion in Iraq firstly.
Two major offensives Fallujah, home to about a half a million people 60km west of Baghdad, was home to some of the first anti-US protests in the aftermath of the 2003 invasion, in May of that year.
When the protests began, residents were content to throw only their shoes at US soldiers, an Arab gesture that signifies anger and disrespect.
But in March 2004, four US employees of a US private security firm, Blackwater, since renamed Xe and later Academi, were killed in the city, leading to two major offensives by US troops against Fallujah.
Widespread fighting in Fallujah against the occupation begun in 2003, after a controversial event known as the "pupil's" uprising.
The US military had turned a primary school into their city headquarters in April 2003. When 200 demonstrators gathered outside asking for the school to be reopened, US forces opened fire, killing at least 13 civilians and injuring dozens.
The US military said they had shot at armed men after being fired upon from nearby rooftops, but marchers insisted their demonstration had been unarmed and peaceful.
In November, a second campaign was launched against the Sunni rebellion, just months before legislative elections in January 2005. Around 2,000 civilians and 140 Americans died, and the battle is considered one of the fiercest for the US since the Vietnam war.