Why did African nations have difficulty repelling the Europeans?

African nations faced difficulties repelling Europeans due to several factors, including technological disadvantages, such as inferior weaponry compared to European firearms. Additionally, many African societies were fragmented, with ethnic and political divisions that hindered unified resistance. The Europeans also exploited existing rivalries and employed strategies like divide-and-conquer, making it harder for African states to mount a coordinated defense. Lastly, the impact of diseases like smallpox, which devastated local populations, weakened their capacity to resist colonization.