In 2024, a flooding event caused by wave overtopping made national news in the United States, with dramatic footage of water bursting through a door.

During World War I, the Japanese seized the Marshall Islands, and later, under the Treaty of Versailles, Japan formally took over operations under the League of Nations mandate.

The fortified Roi-Namur was the target of the U.S. 4th Marine Division landing operation during the Battle of Kwajalein in February 1944, with a part of the island being blown up in an explosion that caused 120 American casualties.

[5] During the Japanese occupation, the two islands, (Roi to the west, and Namur to the east) were connected by a narrow strip of land and a causeway.

Activities on Roi-Namur range from a nine-hole golf course, saltwater swimming pool, scuba club, movie theater, volleyball, and basketball court.

Roi holds the Freeflight International Airport (Marshall Islands) with one runway for small planes commuting from Kwajalein.