Minelayers . CM-1 to CM-12

Originally the armored cruiser CA-3, converted to a minelayer in 1915. Laid over 1,500 mines in the North Sea Mine Barrage during World War I, the massive Allied effort to bottle up the German submarine fleet.

Former protected cruiser converted to minelayer duty during World War I. Participated in the North Sea Mine Barrage alongside Baltimore, helping lay the 70,000-mine field between Scotland and Norway.

A converted freighter pressed into minelaying service during World War I. Named for the county and river in Maine. Served in the North Sea Mine Barrage operations before returning to auxiliary duties after the Armistice.

Former transport converted for minelaying operations during World War I. Later served as a seaplane tender before returning to mine warfare duties. One of the few CM-designated ships to see service across both World Wars.

The only purpose-built minelayer in the CM designation. Present at Pearl Harbor on December 7, 1941, she survived the attack and fought across the Pacific. Struck by a kamikaze at Lingayen Gulf on January 1, 1945. Heavily damaged but never sunk — Terror earned her name.

Former monitor converted for mine warfare duties. Named for the Catskill Mountains of New York. Served in coastal defense and minelaying operations during the final months of World War I.

Former monitor converted to a minelayer during the First World War. Named for the Ozark Plateau region. Performed coastal minelaying duties along the Atlantic seaboard before decommissioning after the war.

Named for the city in Iowa and the earlier Civil War ironclad. Converted from a monitor to minelayer service during World War I. Performed coastal defense and minelaying operations in the Atlantic theater.

Former monitor named for Mount Monadnock in New Hampshire. Converted to minelayer duty during the First World War. Served in Atlantic coastal mine warfare operations before being laid up after the Armistice.

Named for the Narragansett chief Miantonomah, carrying a name with deep Navy heritage. Converted from a monitor to serve as a minelayer during World War I. Performed Atlantic coastal defense duties.

Former monitor converted for minelaying operations during the First World War. Named for Salem, Massachusetts. Served in Atlantic coastal mine warfare before decommissioning after the Armistice.

Named for the Civil War monitor that helped force the surrender of CSS Atlanta. Converted from a monitor to a minelayer during World War I. The last of the converted monitor minelayers in the CM series.