How long will it take for America to remain in Iraq before the Iraq War

[whistle]

...becomes the longest war in American history? American invasion of Iraq II began "Operation Iraqi Freedom" by the US administration, began on March 20, 2003.

<snip>
Vietnam War Time-line

January 20, 1965 - Lyndon B. Johnson takes the oath as president and declares, "We can never again stand aside, prideful in isolation. Terrific dangers and troubles that we once called "foreign" now constantly live among us..."

January 27, 1965 - General Khanh seizes full control of South Vietnam's government.

January 27, 1965 - Johnson aides, National Security Advisor McGeorge Bundy and Defense Secretary Robert McNamara, send a memo to the President stating that America's limited military involvement in Vietnam is not succeeding, and that the U.S. has reached a 'fork in the road' in Vietnam and must either soon escalate or withdraw.
<......>

April 30, 1975 - At 8:35 a.m., the last Americans, ten Marines from the embassy, depart Saigon, concluding the United States presence in Vietnam. North Vietnamese troops pour into Saigon and encounter little resistance. By 11 a.m., the red and blue Viet Cong flag flies from the presidential palace. President Minh broadcasts a message of unconditional surrender. The war is over.

<more>
http://www.vietnamwar.com/timeline65-68.htm