"Ironbottom Sound" (alternatively Iron Bottom Sound or Ironbottomed Sound) is the name given by Allied sailors to Savo Sound, the stretch of water at the southern end of The Slot between Guadalcanal, Savo Island, and Florida Island of the Solomon Islands, because of the dozens of ships and planes that sank there during the Battle of Guadalcanal in 1942-43. Prior to the war, it was called Sealark Channel. Every year on the battle's anniversary, a US ship in the area cruises into the waters and drops a wreath to commemorate those who lost their lives.