In Vietnam ,call this war"North border war"

in China,call this war"self defence border war",China declear war on Vietnam in names of defence border.

of course,you know,China's real aim is :
1,defence border;
2,To take revenge on Vietnam. because Vietnamese killed many Chinese before war;
3,the most important aim:China wish attack Vietnam can make Vietnamese withdraw troops from Kampuchea.if Vietnamese did it,then it can't established"Indochina Federation".
4,many Asian Country(such as Thailand, Laos)afraid Vietnam attack them after they conquer Kampuchea,so they glad to see China teach Vietnam a lesson.in that war,they are in neutrality side.