Canada also used a blue ensign for ships operated by the Canadian government and for the Royal Canadian Navy.
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The most notable usage of the Red Ensign as a national flag was when General Louis Botha flew the flag over Windhoek in what was then German South West Africa after the town's occupation by South African troops in 1915.
Red Army | International Red Cross and Red Crescent Movement | American Red Cross | Red Hot Chili Peppers | Red Sea | Red Star Belgrade | Red | Little Red Riding Hood | Detroit Red Wings | Red Bull | Red River | Red Hat | Red Dwarf | International Committee of the Red Cross | Red River of the North | New York Red Bulls | IUCN Red List | Simply Red | Red Wing, Minnesota | Red Skelton | Red Army Faction | Red Fort | Pokémon Red and Blue | Red Deer, Alberta | Red Deer | International Federation of Red Cross and Red Crescent Societies | Red Square | Rudolph the Red-Nosed Reindeer | Red-necked Stint | British Red Cross |
Most notable for the elaborate flag system is the United Kingdom, that uses the Union flag on land, (inter alia) the Red Ensign for merchant ships, and the White Ensign for the Royal Navy.
Despite its lack of any official status on land, the Red Ensign with Canadian arms was widely used on land, and flew over the Parliament Buildings until 1904 when it was replaced by the Union Flag.