One of the oldest clubs still in existence is Académica de Coimbra, which was founded in 1876. Other historical and notable clubs are F.C. Porto, after an unsuccessful attempt in 1893 (the current foundation date), reappeared in 1906. Boavista F.C. was founded in 1903. S.L. Benfica was born as the result of the fusion in 1908 between Sport Lisboa, founded in 1904, and Grupo Sport Benfica, founded in 1906; the club maintained the foundation date of Sport Lisboa. Sporting CP was founded in 1906. Leixões S.C. founded in 1907, Vitória F.C. of Setúbal plus C.S. Marítimo and C.D. Nacional both of Madeira all founded in 1910, S.C. Olhanense in 1912, S.C. Espinho, Portimonense S.C. and Académico de Viseu F.C. all founded in 1914, C.F. Os Belenenses was founded in 1919. The success of these earlier clubs inspired the rapid spread of football to all corners of Portugal. After the end of World War I, the sprouting of football clubs all over the country gained momentum and in the 1920s S.C. Braga, Guimarães, Gil Vicente and S.C. Beira Mar among many others where founded, further asserting the popularity of the sport wherever it was played with stadiums filled to maximum capacity. By then, the local talent wanting to always better the opposition, further improved the quality of the players training and tactical strategy awareness by investing and importing top foreign coaching and managerial staff from abroad, resulting in the refinement and improvement of the local game quality being able to stand up to top international levels. Some early clubs from the late 1800s and early 1900s, like Carcavelinhos, for example, did not survive and either merged with other clubs or become extinct altogether.