Concluding sentence for these paragraphs?

It's Abyssinia, not Abyssia. Also, you should reword your second last sentence as it is not clear what you mean by "thought the Somalis were done". Done with what? Your concluding sentence shouls summarize your main points. Your main points depend on what you were trying to prove (ie. Thesis). Therefore, the concluding sentence should basically summarize main points that support or prove your thesis.