27 June in military history: Battle of Trzciana, 1629

Koniecpolski's Polish horse and Arnim's imperial cavalry drove the Swedish cavalry back to Sztum, and the Polish Biographical Dictionary calls it a serious victory over the Swedish cavalry. Gustavus Adolphus, who admitted losing ten leather guns and five cornets, wrote that without that first loss it would be doubtful who had suffered more.

Piasecki, Szelągowski and Wachoń give 27 June, and the letters of Koniecpolski and Zawadzki, dated 28 June 1629, call it yesterday. Oxenstierna's note, printed by Geijer, gives 17 June, which Geijer marks as Old style.

He was seized and got away. Piasecki writes that he slipped the belt by which he was held over his head, lost his hat, and, seized again, was freed by a German. Oxenstierna's note credits Erik Soop with rescuing him, but the Swedish Biographical Dictionary says Soop was then in Sweden.

No. Wachoń describes a stalemate after the battle. A six-year truce was signed at Altmark, on 26 September 1629 according to the Polish Biographical Dictionary and Wachoń.

In 1950 President Truman announced that he had ordered US air and sea forces to give South Korean troops cover and support, and the UN Security Council recommended that members help the Republic of Korea repel the armed attack.