 He was very gifted linguistically and was sent on diplomatic missions to King Alfonso XIII of Spain, to Sultan Mehmed V of Turkey and to Emperor Charles I of Austria.In 1918, Friedrich Christian was one of several candidates to the prospective Kingdom of Lithuania.On 13 November of that year, his father abdicated following the German Empire's defeat in the World War I. Friedrich Christian led the Saxon army home from Belgium and France to Germany, where they demobilized in Fulda.