With how many countries you have/had problems? Tibet, Russia , Japan ,India ,Sounth Korea, Vietnam,USA... I am afraid page will be full of country names.
Are you on drug? Tibet is not a country (it's China). If you know the history well, Korea and Vietnam used to be part of China.
China was so weak, that Japan took Korea and France took Vietnam. Russia is an European country how did it take Siberia or Far East Russia?
USA? What territorial dispute with USA?
You would to like to think India is not a land grabber? You full of ****!!! India took Sikkim, Assam, Arunachal Pradesh, Nagaland, etc.