1941-South Greenland Patrol expanded to include 3 cutters of the Northeast Greenland Patrol and form the Greenland Patrol.
1985-CGC Polar Sea arrived home to Seattle after a voyage through the Northwest Passage by way of the Panama Canal, the east coast, and then Greenland, sparking an international incident with Canada. She completed the first solo circumnavigation of the North American continent by a U.S. vessel and the first trip by a Polar-Class icebreaker. She also captured the record for the fastest transit of the historic northern route. She had departed Seattle to begin the voyage on 6 June 1985.
(Source: USCG Historian’s Offiice)