but Algeria and Guinea-Bissau were the others

"Castro began his foray into Africa in late 1961 by sending a shipment of weapons to the National Liberation Front (FLN) rebels fighting the French in Algeria. Although Cuba sent no troops, Castro’s sympathy for the Algerian cause was a foretaste to subsequent Cuban operations in Africa. Following Algeria’s independence in 1962, Castro sent a volunteer medical mission of twenty-nine doctors, three dentists, fifteen nurses, and eight medical technicians to continue to support Ahmed Ben Bella’s government.

In 1963, the Cubans sent a military force of almost seven hundred men to help Algeria defend itself from Moroccan attempts at territorial expansion. Although the Cubans were unable to help Zaire rebels overthrow Mobutu Sese Seko’s pro-US regime in 1965, they sent military instructors and doctors to rebels in Portuguese-controlled Guinea-Bissau in 1966. The Cuban forces remained in Guinea-Bissau until its liberation in 1974. Nevertheless, fewer than 2,000 Cubans went to Africa between 1961 and 1974. Cuban intervention in Angola, however, would take place on a much larger scale."

http://www.cas.ucf.edu/politicalscience/secolas/TLA/issues/fall2004/review_Hall.php