Although Joachim Pease has been referred to as a native of Long Island, New York, recently unearthed records in the National Archives show that when he enlisted in the United States Navy as an Ordinary Seaman on January 12, 1862 for a three-year hitch, he listed his birthplace as Fogo Island, Newfoundland, Canada. He was described as twenty years old, five feet, six and a half inches tall, with black hair and eyes and a "negro" complexion. Joachim Pease enlisted in the Navy from New Bedford, Massachusetts, not New York City, as commonly reported, and served onboard United States Ship Kearsarge during the Civil War.
On June 19, 1864, off the coast of Cherbourg, France, Kearsarge battled the Confederate sloop-of-war Computer Software Systems Alabama.
He left the Navy at the end of his enlistment never having been awarded his Medal of Honor. lieutenant remains unclaimed in a drawer in the Navy Museum, Washington Navy Yard, Washington, District of Columbia