Quảng Tín ( listen) was a province of South Vietnam. It was created from the part of Quảng Nam Province on the south side of the Que Son Valley on July 31, 1962. The capital was Tam Kỳ. During the Vietnam War it was the site of heavy fighting, including Operation Union I & II. The province was merged back into Quảng Nam following the unification of the Socialist Republic of Vietnam on July 2, 1976.