But hours after the 440 members of the 4th Stryker Brigade, 2nd Infantry Division rolled across the Kuwaiti border, unfurled American flags and lit cigars in celebration of their success, military officials cautioned that the war -- and the potential for combat -- in Iraq is not yet finished.
"The combat mission is still under way," Pentagon spokesman Geoff Morell told MSNBC. "It will not formally change until the end of the month."
The U.S. still has around 52,000 troops in Iraq after Wednesday's withdrawal, but that will be trimmed to 50,000 noncombat troops by the end of this month. They will work largely behind the scenes, training, advising and assisting their Iraqi peers but won't be entirely free from danger – or combat.
"I don't think anybody should be under illusions our forces will not be armed. They will be armed," Morell said. "They very well could be in combat situations even after the end of the month."
The words are a striking juxtaposition with the scene playing out along the Iraq-Kuwait border and headlines in major newspapers across the U.S. They also serve as a reminder of the previous signs and signals of a possible end to the violent conflict in Iraq that now ring hollow.
When the war began in March 2003, U.S. officials touted a "shock and awe" campaign that would deal a quick, one-two punch to Saddam Hussein's regime and any his supporters.
Less than two months later, President George W. Bush landed in a fighter jet on the USS Abraham Lincoln and famously heralded victory.
"Major combat operations in Iraq have ended. In the battle of Iraq, the United States and our allies have prevailed," he said under a banner that read "Mission Accomplished."
Then, as war raged on, Bush reminded Americans in December 2003, that the capture of Saddam Hussein -- itself a major milestone -- likely would not bring the conflict to an end.
"The capture of Saddam Hussein does not mean the end of violence in Iraq. We still face terrorists who would rather go on killing the innocent than accept the rise of liberty in the heart of the Middle East," he said.
By 2005, Iraq held its first national elections in a post-Saddam era and the government began drafting a new constitution. It offered a glimmer of hope for an independent Iraq and an end to U.S. military engagement.
But the sectarian violence did not abate, and it threatened to engulf Iraq. Then, Bush announced an escalation of troops known as the "surge."
"This is not the fight we entered in Iraq, but it is the fight we are in," he said in his State of the Union Address in January 2007. "Many in this chamber understand that America must not fail in Iraq because you understand that the consequences of failure would be grievous and far-reaching."
The 30,000 additional U.S. troops ultimately proved effective, but cost hundreds of American lives and took a toll on public support for the war.
Less than 500 U.S. service members died in Iraq in 2003; but by the end of 2007, the number approached 4,000.