All four main gates of the ancient citadel head toward the west. This was the place where Lam Son insurgents; attack on September 28th, 1427, the battle against supporting troops on November 3, 1427 took place. According to Le Quy Don’s statement recorded in the Great History of the Great Viet: “since Tran Dynasty to that time, apart from the arrest of Tich Le Co, O Ma Nhi, there had never been such a great triumph over the North invaders in our country”. Annually, locals in Bac Giang hold a festival lasting for two days on the 6^th and 7^th days of the first lunar month to commemorate the victory of Lam Son insurgents in Xuong Giang. {itpsharepoint}