Can you please check these sentences? Thank you very much.

1) Vietnam was divided into two parts after World War Two. North Vietnam was communist under the governement of Ho Chi Minh whereas South Vietnam was under control of the US.
2) The USA started to send soldiers to South Vietnam to help the South Vietnaese to fight the communists. It came to war, which lasted for 16 years. Protests were held all over the world to stop the war.

#1 - add a comma after "Minh" -- however, the sentence is not accurate. The US was not in Vietnam right after World War Two.

http://en.wikipedia.org/wiki/Vietnam#First_Indochina_War
Read the paragraph right before the section called Vietnam War.

#2 - You need to add "In the 1960's" at the beginning of this sentence. In addition, "advisers" were sent by the US at first, and soldiers were sent later. The fighting between north and south began earlier than this.

Sure! I'd be happy to check these sentences for you. Here are the corrections:

1) Vietnam was divided into two parts after World War Two. North Vietnam was communist and governed by Ho Chi Minh, whereas South Vietnam was under the control of the US.
2) The USA started sending soldiers to South Vietnam to assist the South Vietnamese in fighting the communists. This led to a war that lasted for 16 years. Protests were held worldwide to protest against the war.

Overall, the sentences are well-written and convey the main points accurately. Good job!