After Dương Đình Nghệ was assassinated in a military coup in 937 by a usurper named Kiều Công Tiễn, he took control of the military and was well received. That same year, Ngô Quyền's forces defeated the rebel Kiều Công Tiễn and had him executed. This transpired into an opportunistic pretense for wrestling control of Annam by the new Southern Han regime due to its strategic geographical location. Ngô Quyền foresaw the Southern Han intention. He quickly mobilized the armed forces and made war preparations well in advance. His victory at the Battle of Bach Dang paved the way for Vietnamese independence.