With the aim of seizing sovereignty over Huế, a 28-day battle between the South Vietnamese Liberation Army and the US Army and the Army of the Republic of Vietnam took place and resulted in 40% of the city being destroyed, 116,000 homeless people. The US Army and the Army of the Republic of Vietnam suffered about 4,400 casualties, while the South Vietnamese Liberation Army and the Vietnam People's Army also lost over 4,000 troops. Also in this re-occupation, the US army used maximum heavy weapons such as napalm bombs, cannons, tank cannons and large recoilless guns . Out of 17,134 houses in Huế, 9,776 houses were completely destroyed, 3,169 were severely damaged; The number of civilians killed according to the first estimate of the government of the Republic of Vietnam was 3,776. The South Vietnamese Liberation Army documents said they buried about 2,000 bomb victims in mass graves along with their own dead soldiers.