In 1915 and 1916 in the period of fighting in East Africa during World War I a large series of emergency issues of paper money were issued. 1916 also saw a final issue of coins to pay German led troops, including 15 Rupien coins which contained an equivalent amount of gold from the Sekenke Gold Mine to equal 15 German Marks. Later in 1916 German East Africa was occupied by British and Belgian forces. In Tanganyika, the Rupie circulated alongside the East African rupee (to which it was equal) until 1920, when both were replaced by the East African florin at par. In Burundi and Rwanda, the Belgian Congolese franc replaced the Rupie in 1916.