Explanation: During the late 19th century, Europe haphazardly colonized most of the African continent, which is a vast and diverse place.
In the 1950s, decolonization began as the empty promises made during WW1 began to catch up to the declining strength of European empires. The Euros, in releasing each newly independent country from their control, did so with pre-existing institutions and borders which were largely constructed either according to the arbitrary divisions Euros made amongst themselves ("This is MY square, and that is BELGIUM'S square") or with conscious intent to 'divide and rule', playing different ethnic groups against each other. While the European empires may not have intended to keep that sense of division after releasing the resulting states, they sure as shit did nothing to resolve it, suggesting, at best, callous apathy towards the future of these countries they insisted they had colonized for 'humanitarian' reasons.
For this reason, many African countries have struggled to forge cohesive national identities since independence, lacking longstanding ethnic ties (and often having multiple significant cross-border ethnic ties, making any internal conflict quickly escalate), uniting civic traditions, or even, in some cases, common economic interests.