The borders of the republic were extended to the East as the result of the Polish–Soviet War (May – October 1920), resulting from Semyon Budyonny's August 1920 military foray into former Russian Poland as far as Warsaw. The Soviets withdrew in panic during the 1920 major Polish counter-offensive. The newly re-established sovereign Poland created Wołyń Voivodeship as one of the 16 main administrative divisions of the country.