A sagamore is the head of a Native American tribe. It's generally synonymous with sachem, although sometimes a sachem is considered a chief of the first rank, and a sagamore one of the second rank.
Sachem then returned by the back route to the Mississippi between Vicksburg and Port Hudson where she served as a dispatch vessel carrying messages and supplies between Army and Navy units besieging those two Southern river strongholds.
Early in September, Sachem was assigned to a joint Army-Navy expeditionary force mounted at New Orleans to attack Sabine Pass, Tex. Possession of this port would close another important Confederate blockade running center and provide the Union with a base for a thrust into the interior of Texas.
In March 1864, Sachem was back at Sabine Pass; and, in April, was said to be commanded by a noted blockade runner of Galveston, John Davisson; was reportedly laden with cotton and awaiting a chance to slip through the blockade.
On the 17th, Sachem was assigned to the Coast Survey and, with the assistant in charge, soon sailed for the Gulf of Mexico where Flag Officer Farragut was preparing to attack New Orleans.
Sachem, meanwhile, was busy transporting the wounded to the hospital at Pilot Town, mapping the labyrinthian waterways in the vicinity, supplying pilots for military traffic on the river, and helping to refloat Miami after that gunboat had run aground.
In March 1864 Sachem was back at Sabine Pass; and, in April, was said to be commanded by a noted blockade runner of Galveston John Davisson, was reportedly laden with cotton an] awaiting a chance to slip through the blockade.