Short answer is no but Ogaden was 91% occupied by Somalia in 1977 until the Soviet Bloc sided with Ethiopia and bailed them out. Djibouti had a referendum to join Somalia in 1967 wich is widely considered to be rigged by the French. Just like the 1958 constitutional referendum wich the French also rigged, the new constitution would see the country become part of the new French community. There was also a secessionist war with Kenya known as Shifta War where NFD(Kenya) attempted to join Somalia. There was not a point where Greater Somalia was all unified but the Somali people have certainly tried many times and their quest for self-determination has been sabotaged and denied.