Could be a variant of the Confederate First National, Stars and Bars, for example:

http://images.google.com/imgres?imgurl=http://www.yellow-rose.net/1st%2520Flag%2520CSA%2520Stars-n-Bars.gif&imgrefurl=http://www.yellow-rose.net/CSA.htm&usg=__ysXBrDmlF0exURF5M1aSv8MzjDU=&h=230&w=240&sz=35&hl=en&start=108&um=1&itbs=1&tbnid=pjYItDDSgV4eDM:&tbnh=105&tbnw=110&prev=/images%3Fq%3Dconfederate%2Bstars%2Band%2Bbars%2Bflag%26ndsp%3D18%26hl%3Den%26client%3Dsafari%26rls%3Den%26sa%3DN%26start%3D90%26um%3D1