Administrative divisions of Lithuania Governorate (consisting of eleven districts) and Slonim Governorate, were established after the third partition of the Polish–Lithuanian Commonwealth. Just a year later, on December 12, 1796, they were merged into one governorate, called Lithuania Governorate, with capital in Vilnius. In 1801 Lithuania Governorate was split into Lithuania-Vilna Governorate and Lithuania-Grodno Governorate. Forty years later the word "Lithuania" was dropped from the two names and official maps of Europe. The territory of the former Grand Duchy of Lithuania became known as the Northwestern Krai. In 1843 another administrative reform took place, creating Kovno Governorate out of seven western districts of the
History of Lithuania 1410, but the allied armies failed to take Marienburg, the Knights' fortress-capital. Nevertheless, the unprecedented total battlefield victory against the Knights permanently removed the threat that they had posed to Lithuania's existence for centuries. The Peace of Thorn (1411) allowed Lithuania to recover Samogotia, but only until the deaths of Jogaila and Vytautas, and the Knights had to pay a large monetary reparation. The Union of Horodło (1413) incorporated Lithuania into Poland again, but only as a formality. In practical terms, Lithuania became an equal partner with Poland, because each country was obliged to choose its future ruler only with