Mgbe ọ gụsịrị akwụkwọ, Jefferson Davis jere ozi afọ isii dị ka onye lieutenant na United States Army. Ọ lụrụ ọgụ na agha Mexico-America (1846-1848), dị ka onye isi nke ndị ọrụ afọ ofufo. Tupu Agha Obodo America, ọ na-arụ ọrụ nnukwu osisi owu na Mississippi, nke nwanne ya nwoke bụ Joseph nyere ya, ma nwee ihe ruru ndị ohu 113. Ọ bụ ezie na Davis rụrụ ụka megide nkewa na 1858, o kwenyere na o nwere ikike a na-apụghị ịgbagha agbagha ịhapụ Union. Ajụjụ: Gịnị ka Davis mere tupu Agha Obodo?
na-arụ ọrụ n'otu nnukwu ugbo owu.