He served as Gabon 's Ambassador to Germany and was later the Secretary - General of the Gabonese Union for Democracy and Development ( UGDD ) , an opposition party .
Sylvestre Augustin Ratanga ( born 1945 ? ) is a Gabonese politician and diplomat .
Sylvestre Augustin Ratanga served as Gabonese 's Ambassador to Germany and was later the Secretary - General of the Gabonese Union for Democracy and Development ( UGDD ) , an opposition party .
Sylvestre Augustin Ratanga ( born 1945 ? ) is a Gabonese politician and diplomat .