CHARLESTON, S.C. – It's an historic day in the annals of submarine warfare.
Monday marks the 150th anniversary of the attack by the Confederate submarine H.L. Hunley on the Union blockade ship Housatonic, which sank off Charleston during the Civil War. Although the Hunley never returned, it became the first submarine to sink an enemy warship.
Re-enactors are to gather Monday evening on the coast from where the Hunley departed. A memorial service is th honor both the Hunley crew and the Union crewmen who died.
The hand-cranked Hunley is being conserved at a lab in North Charleston.
Just why the Hunley sank is still unclear. But scientists now say it was so close to the Housatonic the crew may have been knocked out by the explosion that sank the blockade ship.