In the late 14th century Dobrotitsa used the Navy to put his cousin on the Trebizond throne and later lead a war against Genoa which lasted to 1387 when his son Ivanco settled a favourable peace. In 1366 Amadeus VI of Savoy lost several ships during the siege of Varna.
In the late 14th century Dobrotitsa employed naval forces to install his cousin on the throne of Trebizond, followed by a conflict against Genoa that persisted until 1387 when his son Ivanco negotiated a beneficial peace. Meanwhile, in 1366 Amadeus VI of Savoy suffered losses during the siege of Varna.