The death of prince Alexander Soutzos in 1821, coinciding with the outbreak of the Greek War of Independence, established a boyar regency which attempted to block the arrival of Scarlat Callimachi to his throne in Bucharest. The parallel uprising in Oltenia, carried out by the Pandur leader Tudor Vladimirescu, although aimed at overthrowing the ascendancy of Greeks, compromised with the Greek revolutionaries in the Filiki Eteria and allied itself with the regents, while seeking Russian support (see also: Rise of nationalism under the Ottoman Empire).