...composed of the Thirteenth and Sixteenth Corps, Knipe's cavalry division, and a brigade of cavalry, a division of infantry, and another of negro troops, under General Steele, at Barrancas. The West Gulf Squadron, commanded by Rear-Admiral Thatcher, was there, to co-operate. Mobile was so strongly fortified, that a direct attack upon it on the western side of the bay, was deemed too hazardous, an...