His first diplomatic work of importance was the negotiation of a marriage between the grand duchess Olga and the crown prince Charles of Wurttemberg.
Two other United States warships, "Trenton" and "Vandalia," were beaten to pieces on the coral reef; and the German warships "Olga" and "Eber" were wrecked with great loss of life.
King George married, on the 27th of October 1867, the grand duchess Olga Constantinovna of Russia, who became distinguished in Greece for her activity on behalf of charitable objects.
The northern part of the Sea of Japan, which washes the Usuri region, has, besides the smaller bays of Olga and Vladimir, the beautiful Gulf of Peter the Great, on which stands Vladivostok, the Russian naval station on the Pacific. Okhotsk and Ayan on the Sea of Okhotsk, Petropavlovsk on the east shore of Kamchatka, Nikolayevsk, and Vladivostok on the Sea of Japan, and Dui on Sakhalin are the only ports of Siberia.