Tim Walz's battalion commander came out swinging with a scathing post on Facebook.

Several videos of Tim Walz lying about his military rank and service in combat have surfaced.

Walz never deployed. He abandoned his battalion after they were deployed to Iraq so he could run for Congress.

Tim Walz introduced himself at a 2006 veterans event as a "retired command sergeant major," which is a lie.

Stolen valor Tim Walz lied about his rank in a 2009 farewell message to soldiers actually deploying to Iraq.

In the 2009 video, Walz falsely claims he is a "retired Command Sergeant Major" as he sends a farewell message to soldiers deploying.

Tim Walz dropped out of the Army after his unit was deployed to Iraq.

Retired Command Sergeants Major Thomas Behrends and Paul Herr also published a scathing letter in the West Central Tribune, exposing what they claim are significant fabrications and omissions in Walz's military record.

Here is a summary of the timeline detailing how Tim Walz has lied about his military career:

September 18, 2001: Tim Walz reenlisted in the Minnesota Army National Guard for six years.

Early 2003: Selected to attend the United States Army Sergeants Major Academy.

Late Summer 2003: Deployed with the 1-125th Field Artillery Battalion to Italy for six months in support of Operation Enduring Freedom.

Spring 2004: Returned to Minnesota and selected as Command Sergeant Major of the 1-125th Field Artillery Battalion.

August 5, 2004: Photographed at a protest outside a President Bush campaign rally.