Sweden had little independent foreign interaction while it was committed to the
Kalmar Union, and Gustav’s earliest reign aimed at little more than self-preservation. As he was in debt to merchants of Lübeck and the Hanseatic League, he fought together with Denmark against the League, and achieved victory after a truce of August 28, 1537. But Gustav regarded Denmark with suspicion. The attitude of Sweden's eastern neighbor Russia was also offensive, and the Swedish king was initially anxious to stand on good terms with that kingdom. Gustav attributed to
Ivan IV of Russia, whose resources he unduly over-estimated, the design of establishing a universal monarchy round the
Baltic Sea, and waged
an inconclusive war against him in 1554–1557.
First involvements Ultimately, Sweden departed from its neutrality and laid the foundations of its later overseas empire. In the last year of Gustav's life, 1560, the ancient
Livonian Order, had by the secularization of the latter order into the dukedom of
Prussia, 1525, had become isolated between hostile
Slavonians. The situation became critical in 1558–1560, when floods of Muscovites poured over the land, threatening the whole province with destruction. In his despair, the last master of the order
Gotthard von Kettler, appealed to his civilized neighbours to save him. Eric became ruler by October 1560, and already later that year he engaged Sweden in the
Livonian War. By March 1561, the city council of
Reval surrendered to Sweden, and became the outpost for further Swedish conquests in the area. From the moment, Sweden was forced to continue on a policy of combat and aggrandisement, because a retreat would have meant the ruin of its
Baltic trade. Erik XIV also obstructed Danish plans to conquer Estonia, and added the insignia of Norway and Denmark to his own coat of arms. Lübeck, upset over obstacles of trade that Erik had introduced to hinder the Russian trade and withdrawn trade privileges, joined Denmark in a war alliance. Poland soon joined, wanting control of the Baltic trade.
Deepening involvements At Bornholm, on May 30, 1563, the Danish fleet fired on the Swedish navy. A battle arose that ended with Danish defeat. German royal emissaries were sent to negotiate a peace, but at the meeting place of
Rostock no Swedes appeared. On August 13, 1563, war was declared in Stockholm by emissaries from Denmark and Lübeck. The so-called
Northern Seven Years' War commenced, with exhausting assault on land and water. Eric undaunted continued the war until his insanity in 1567 halted the Swedish warfare. He was dethroned in 1568 and replaced by John, who made peace attempts, which were eventually successful by the
Treaty of Stettin in 1570. John then entered an anti-Russian league with
Stephen Báthory of Poland in 1578. The war between Russia and Sweden for the possession of Estonia and
Livonia (1571–1577) had been uninterruptedly disastrous to Sweden, and, in the beginning of 1577, a countless Russian host sat down before Reval. With the help of Bathory, however, the scales soon turned in the opposite direction. Six months after his humiliating peace with the Polish monarch, Ivan IV was glad to conclude a truce with Sweden also on a basis
at Plussa, on August 5, 1582. The
war was resumed by Russians as soon as the truce expired, leading to the
Treaty of Tyavzino, far less advantageous for Sweden.
Sigismund and Polish relations Duke
Sigismund of Sweden, the son of John III, was brought up by his mother in the
Catholic religion. On August 19, 1587, he was elected king of Poland. Sixteen days later the
Articles of Kalmar, signed by John and Sigismund, regulated the future relations between the two countries when, in process of time, Sigismund should succeed his father as king of Sweden. The Articles of two kingdoms were to be in perpetual alliance, but each of them was to retain its own laws and customs. Sweden was also to enjoy its religion, subject to such changes as the
Privy Council might make; but neither pope nor council was to claim or exercise the right of releasing Sigismund from his obligations to his Swedish subjects. During Sigismund's absence from Sweden that realm was to be ruled by seven Swedes, six elected by the king and one by his uncle Duke
Charles of
Södermanland, the leader of the Swedish
Protestants. No new tax was to be levied in Sweden during the king's absence, but Sweden was never to be administered from Poland. Any necessary alterations in these articles were only to be made with the common consent of the king, Duke Charles, the Estates and the gentry of Sweden. == See also ==