(CNSNews.com) -- More than 300 U.S. soldiers have died in  the war in Afghanistan since May 15, 2009, the day when the first major wave of new troops ordered by President Barack Obama arrived in the country.  The 308 U.S. casualties in Afghanistan since then account for about a third of the total of 920 U.S. casualties in the eight-year war. Of the 308 soldiers who have died since mid-May 2009, 287 were killed by enemy action, according to a CNSNews.com database of all casualties in the Afghanistan theatre of war.  Approximately 81 U.S. soldiers have died in combat in Helmand and 58 in Kandahar, for a total of 139 in those two provinces.  That is about 45 percent of the U.S. casualties in Afghanistan since May 15 of last year.