How many countries were involved in the Vietnam War?
10
5
1
5
2
1
5
2
1
5
2
1
5
2
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
2
3
4
1
5
6
2
3
4
1
5
6
2
3
4
1
5
6
2
3
4
1
5
6
9
2
3
4
1
6
9
2
3
4
7
6
9
3
4
7
6
9
3
4
7
8
6
9
3
4
7
8
6
9
3
4
7
8
6
9
14
0
7
8
6
9
14
11
0
7
8
6
9
14
11
7
8
10
6
9
0
14
11
7
8
10
6
9
2 countries
14
0
11
5 countries
7
8
10
6
9
14
11
4 countries
0
7
8
10
6
9
14
11
69
135
7
8
10
6
9
0
14
11
13
7
8
10
6
69
6 countries
9
135
14
0
11
13
9 countries
7
8