When the First World War broke out, "Africa" was transferred back to the 3rd Battle Squadron, which was assigned to the Grand Fleet, the main British fleet during the war. Through 1914 and 1915, the ships frequently went to sea to search for German vessels, but "Zealandia" saw no action during this period. By the end of the year, the Grand Fleet stopped operating with the older 3rd Battle Squadron ships, and in April 1916 the 3rd Squadron was relocated to the Nore Command. Later that year, "Africa" was attached to the 2nd Detached Squadron, then serving in the Adriatic Sea. In 1917, she was sent to the 9th Cruiser Squadron, based in Sierra Leone; while she was there, her crew was stricken with Spanish flu. "Africa" returned to Britain in October 1918, was decommissioned the following month, and sold for scrap in 1920.