Tycho Brahe personalities. When Tycho and Vedel returned from Leipzig in 1565, Denmark was at war with Sweden, and as vice-admiral of the Danish fleet Jørgen Brahe had become a national hero for having participated in the sinking of the Swedish warship "Mars" during the First battle of Öland (1564). Shortly after Tycho's arrival in Denmark, Jørgen Brahe was defeated in the Action of 4 June 1565, and shortly afterwards died of a fever. Stories have it that he contracted pneumonia after a night of drinking with the Danish King Frederick II when the king fell into the water in a Copenhagen
Tycho Brahe keep the distinguished scientist, he offered Tycho the island of Hven in Øresund and funding to set up an observatory. Until then, Hven had been property directly under the Crown, and the 50 families on the island considered themselves to be freeholding farmers, but with Tycho Brahe's appointment as Feudal Lord of Hven, this changed. Tycho took control of agricultural planning, requiring the peasants to cultivate twice as much as they had done before, and he also exacted corvée labor from the peasants for the construction of his new castle. The peasants complained about Brahe's excessive taxation and took him