Third Indochina War
7 countries took part.
Read about Third Indochina War on Wikipedia
| Country | Years |
|---|---|
 Cambodia
|
1975 to 1991 |
 Cuba
|
1975 to 1991 |
 Laos
|
1975 to 1991 |
 People's Republic of China
|
1975 to 1991 |
 Thailand
|
1975 to 1991 |
 United Kingdom
|
1975 to 1991 |
 Vietnam
|
1975 to 1991 |