Can you please check if the following questions are correct?

Question

1) Which Lennon’s song became a special song for peace?
2) In which other Lennon’s song is there a strong anti-war message?
3) Who was Vietnam a colony of? Or Which country was ..? Vietnam was a French colony.
4) In how many parts did Vietnam divide after World War II?
When did the American government send troops to Vietnam?
5)Until when did the war last?
6)Which kind of music was an important part of the peace movement? Folk and rock music were an important part of the peace movement.
7) What kind of festival was Woodstock? Woodstock was a three-day music and peace festival.
8) Which letters does the peace symbol use?

Answer 1

3) Who was Vietnam a colony of? Or Which country was ..? Vietnam was a French colony.

Of what country was Vietnam a colony?

5. When did the Vietnamese War end?