The 24-year-old was in Khost on July 14th when his unit was shot at with rocket grenades and smalls arms fire. The man was injured in the attack and died of his injuries in a military hospital, according to the US defence department.
The dead soldier has been identified as Staff Sgt. Carl E. Hammar, 24, of Lake Havasu City, Arizona and was serving with the 1st Battalion, 501st Infantry Regiment.
Carl Eric Hammar held dual citizenship and grew up in Grillby near Enköping in eastern Sweden, according to Expressen. He travelled to the US as an exchange student when he was 17-years-old and signed up to the US military.
He has twice served in Iraq and was sent to Afghanistan in December. He will now be buried in Arlington national cemetery in Virginia beside many other US casualties of war.
Known as Eric, Hammar was the father of two children - aged one and seven.
Khost province is one of the 34 provinces of Afghanistan and lies in the east of the country.