I really really do not think so  there have been several attempted secessions such as Katanga Biafra Soutehrn Sudan Eritrea etc and quite a number of  incidents in which one country intervened in a civil war in another country but the number of straightup classical territorialacquisition border wars has been rather small  mainly between Chad and Libya over the Aouzou strip and between Ethiopia and Eritrea over Badme  You could also count Western Sahara if you want though its not what I would really call a straightup classical territorialacquisition border war but after that its fairly slim pickings  and in any case what is actually more relevant to the article is that international law and the principles of the OAU uphold former colonial borders as the basis of modern state boundaries subject to certain mutuallyagreed adjustments      I have to admit Ive read a lot of your edits Id suggest that you are the one who has strong feelings on the subject Most of your edits tends to have a politicial motivation in my opinion Which in general isnt too helpful to the accuracy of an article