In late August, Lithuanian and Polish missions met in Kaunas to negotiate the situation. While the talks were underway, Polish troops retook Sejny, Augustów, and Suwałki in the south. The Suwałki Region held great symbolic importance for the Lithuanians as a locus of their independence movement. Lithuania mounted military operations in the area. Poland also wanted to reclaim Vilnius, which it had been forced to abandon during the Soviet offensive in July. The clashes led to a war on a wide front between Poland and Lithuania in September. An intervention was made by the League of Nations, which brokered the Suwałki Agreement on October 7, 1920, which was to have taken effect on October 10. However, on October 9, Polish General Lucjan Żeligowski staged a mutiny, invaded Lithuania and took over Vilnius. Most of the Vilnius and Suwałki Regions would remain under Polish control during the interwar period, and interwar Polish–Lithuanian relations were described as "no war, no peace".