How many Union states participated in the Civil War?
20
3
5
3
4
5
3
4
2
5
3
4
2
5
3
4
2
5
3
4
2
5
3
4
1
2
5
3
4
1
2
5
3
4
1
2
5
3
4
7
1
2
6
5
3
4
7
1
2
6
5
3
8
4
7
1
2
6
5
11
3
8
4
7
1
2
6
5
11
10
3
8
4
7
1
2
6
62
5
11
10
3
8
13
4
7
16
9
1
2
6
5
11
10
3
66
8
62
13
12
4
7
16
9
1
2
6
5
11
61
63
10
3
8
13
12
4
66
62
7
16
17
9
1
2
6
0
5
11
10
3
8
13
12
4
61
63
7
16
17
9
66
1
2
6
62
14
5
11
10
3
8
0
13
12
4
58
7
61
63
16
17
9
1
2
6
14
5
11
10
3
66
8
62
13
12
4
0
7
16
17
9
59
58
1
2
6
14
5
11
61
63
10
8
57
13
12
4
66
62
7