Charles, like his father Oscar I, was an advocate of Scandinavianism and the political solidarity of the three northern kingdoms, and his friendship with Frederick VII of Denmark, it is said, led him to give half promises of help to Denmark on the eve of the war of 1864, which, in the circumstances, were perhaps misleading and unjustifiable. In view, however, of the unpreparedness of the Swedish army and the difficulties of the situation, Charles was forced to observe a strict neutrality. On behalf of Charles, Dirk de Graeff van Polsbroek, Dutch diplomat in Japan, concluded a "Vänskaps-, handels- och sjöfartstraktat" ("Friendship, Trade and Maritime Treaty") between Sweden-Norway and Japan on 11 November 1868 (see the Treaty of Yokohama). The treaty opened Hakodate, Yokohama, Nagasaki, Kobe and Osaka to trade for Swedish and Norwegian traders (Article 3). The treaty also gave Sweden-Norway the opportunity to send consuls to the newly opened ports, where they were given the right to exercise jurisdiction over Swedes and Norwegians (consular jurisdiction).Sweden, Japan, and the Long Second World War: 1931–1945, by Pascal Lottaz, Ingemar Ottosson Charles died in Malmö on 18 September 1872. ch 41 pp 289–99 thumb|Coronation medal for Charles and Louise 1860 Charles XV attained some eminence as a painter and as a poet. He was followed on the thrones of both Norway and Sweden by his brother Oscar II.
Charles, like his father Oscar I, was an advocate of Scandinavianism and the political solidarity of the three northern kingdoms, and his friendship with Frederick VII of Denmark, it is said, led him to give half promises of help to Denmark on the eve of the war of 1864, which, in the circumstances, were perhaps misleading and unjustifiable. In view, however, of the unpreparedness of the Swedish army and the difficulties of the situation, Charles was forced to observe a strict neutrality. On behalf of Charles, Dirk de Graeff van Polsbroek, Dutch diplomat in Japan, concluded a "Vänskaps-, handels- och sjöfartstraktat" ("Friendship, Trade and Maritime Treaty") between Sweden-Norway and Japan on 11 November 1868 (see the Treaty of Yokohama). The treaty opened Hakodate, Yokohama, Nagasaki, Kobe and Osaka to trade for Swedish and Norwegian traders (Article 3). The treaty also gave Sweden-Norway the opportunity to send consuls to the newly opened ports, where they were given the right to exercise jurisdiction over Swedes and Norwegians (consular jurisdiction).Sweden, Japan, and the Long Second World War: 1931–1945, by Pascal Lottaz, Ingemar Ottosson Charles died in Malmö on 18 September 1872. ch 41 pp 289–99 thumb|Coronation medal for Charles and Louise 1860 Charles XV attained some eminence as a painter and as a poet. He was followed on the thrones of both Norway and Sweden by his brother Oscar II.