MAY 25TH, 1861: Commander Dahlgren, Commandant Washington Navy Yard, reported the capture of steamer Thomas Colyer by USS Pawnee, Commander Rowan, in Alexandria.
** USS Minnesota, Flag Officer Stringham, seized bark Winfred near Hampton Roads.
MAY 26TH, 1861: USS Brooklyn, Commander Charles H. Poor, set blockade of New Orleans and mouth of the Mississippi River.
** USS Powhatan, Lt. D.D. Porter, set blockade at Mobile.
Setting a blockade required notifying the port and then giving a certain amount of time for ships to leave and for word to get around of the blockade to incoming vessels.