Mysia was a region in the northwest of ancient Asia Minor. It was located on the south coast of the Sea of Marmara. It was bounded by Bithynia on the east, Phrygia on the southeast, Lydia on the south, Aeolis on the southwest, Troad on the west, and the Propontis on the north. In ancient times it was inhabited by the Mysians, Phrygians, Aeolian Greeks and other groups.

Anatolia, also known as Asia Minor, is a large peninsula located in West Asia and a region of Turkey, constituting most of its contemporary territory. Geographically, the Anatolian region is bounded by the Mediterranean Sea to the south, the Aegean Sea to the west, the Turkish Straits to the north-west, and the Black Sea to the north. The eastern and southeastern boundary is either the southeastern and eastern borders of Turkey, or an imprecise line from the Gulf of Iskenderun to the Black Sea. Topographically, the Sea of Marmara connects the Black Sea with the Aegean Sea through the Bosporus strait and the Dardanelles strait, and separates Anatolia from Thrace in the Balkan peninsula of Southeastern Europe.