sentences:  The sword helped them push back the enemy, until Vietnam was once again free from Chinese rule.Lê Lợi ascended the throne in 1428, ending his 10-year campaign, and reclaimed independence for the country.One year after ascending the throne, Lê Lợi was on a dragon boat cruising around Hồ Lục Thủy (Green Water Lake), directly in front of his palace.