Direct U.S. military involvement ended on 15 August 1973 as a result of the Case–Church Amendment passed by the U.S. Congress. The capture of Saigon by the NVA in April 1975 marked the end of the war, and North and South Vietnam were reunified the following year.
After the mongol invasion.
An unofficial group of colonists :)
Explanation:
You csn describe by many ways like firstly what is writing how did it start from where did it start and why did it start thats how you can