Discuss as:

Military 'birther' pleads guilty

The Army lieutenant colonel who refused to deploy to Afghanistan because he claims President Obama is not a natural-born American has pleaded guilty to one charge against him.

Lt. Col. Terrence Lakin pleaded guilty to not reporting to Fort Campbell (KY) for his deployment to Afghanistan. Lakin claims the order from President Obama as commander-in-chief is "unlawful" because he has not proven he was born in the United States.

Lakin could face up to 18 months in prison, but Army officials tell NBC News instead of jail time it's "likely" the court will order him discharged from the Army.

That could prove to be expensive. Army officials say at 18 years of service, Lakin is two years short of full retirement, which over a lifetime could total as much as a couple million dollars in retirement pay and benefits.

Lakin still faces court martial on a second charge of missing his flight to Afghanistan.