To give the rebels weapons, together worked in East Prussia Poles from Greater Poland, Mazury and Warmia , to a lesser extent Germans and especially Jews - both local as well as those from the Kingdom of Poland. In Königsberg an underground network that introduced weapons from Western countries emerged. It was founded by the trading company of the brothers Chostomski and Koronowicz. Its most active helpers were, among others the Jewish merchant Johann Sohn and the agent of the Polish National Government J. Reichstein. In the base of the insurgents in Friedrichshof, district Szczytno, teamed up with the sale of weapons mainly of Masure Robert Kosiorek and the Jew Eyssig Keller out. At the Masurian Lakes the Jew Z. Steinhirt and Masure Szarejko made a similar duet. In almost every town and in the southern Warmia Mazury there were Jewish companies that smuggled along with the Mazury and Warmia population, sometimes with the German, illegal weapons across the border into the Kingdom of Poland and Lithuania. This co-operation and mutual trust were, thanks to the time of Polish-Jewish brotherhood 1861-1862 possible. Of the 44 Jews who helped the Poles in East Prussia during the January Uprising, located just two proved to be a traitor.
Instytut Północny im. Wojciecha Kętrzyńskiego w Olsztynie
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