Mezue ahịrịokwu na-esonụ: N'afọ 1864, Osborn nyere iwu na 1st Brigade, 1st Division nke XXIV Corps nke Army of the James. Osborn merụrụ ahụ nke ukwuu na
Agha nke Drewry's Bluff na Mee 14, 1864, mgbe egbe egbe gbajiri aka nri ya ma tinye ya n'aka ya. Ọ nọrọ n'ụlọọgwụ ruo ọnwa Septemba tupu a tọhapụ ya maka ọrụ. Na December, ọ gbakeela ruo n'ókè nke ịbịa rụọ ọrụ. Otú ọ dị, ọ rịara ọrịa ankylosis n'ikpere aka ahụ e merụrụ ahụ́ ná ndụ ya nile.