After a mutiny in the Semenovsky Regiment in 1820, the society decided to suspend activity in 1821. Two groups, however, continued to function secretly: a Southern Society, based at Tulchin, a small garrison town in Ukraine, in which Pestel was the outstanding figure, and a Northern Society, based at Saint Petersburg, led by guard officers Nikita Muraviev, Prince S. P. Trubetskoy and Prince Eugene Obolensky. The political aims of the more moderate Northern Society were a British-style constitutional monarchy with a limited franchise. They envisioned that it could be replaced with a republic in the future but only according to the will of the people. They also believed there should be a legislative assembly and did not call for the execution of the imperial family. They supported the abolition of serfdom, according to the interests of Russian landlords, i.e. with land to be retained by landlords, in a style similar to the abolition of serfdom in Baltic provinces. They also supported equality before the law. The Southern Society, under Pestel's influence, was more radical and wanted to abolish the monarchy, establish a republic, similar to the Union of Salvation, and contrary to the Union of Salvation plans, to redistribute land, taking half into state ownership and dividing the rest among the peasants. The Society of United Slavs (also known as the Slavic Union – Pan-Slavism) was established in Novograd-Volynsky in the Ukraine in 1823. Its never-written program was similar to that of the Southern Society but the main emphasis was on the equal federation of Russia (including Ukraine), Poland, Moldavia (including Bessarabia) with the attachment of Wallachia, Transylvania, Hungary (including Slovakia, Slovenia, Vojvodina, the Carpatho-Ukraine aka Zarkarpattia), Croatia, Serbia, Dalmatia, the Czech lands of Bohemia and Moravia, i.e. all Slavic & Vlach countries with the exception of Bulgaria and Macedonia, in the future. This society joined the Southern Society and adopted its program in exchange for the recognition of the Slavic federation zeal by the Southern society in September 1825.