A seminal event occurred in 1821, when the rise of Greek nationalism in various parts of the Balkans in connection with the Greek War of Independence led to occupation of the two states by the Filiki Eteria, a Greek secret society who sought, and initially obtained, Russian approval. A mere takeover of the government in Moldavia, the Eterist expedition met a more complex situation in Wallachia, where a regency of high boyars attempted to have the anti-Ottoman Greek nationalists confirm both their rule and the rejection of Phanariote institutions. A compromise was achieved through their common support for Tudor Vladimirescu, an Oltenian "pandur" leader who had already instigated an anti-Phanariote rebellion (as one of the Russian "sudiți", it was hoped that Vladimirescu could assure Russia that the revolt was not aimed against its influence). However, the eventual withdrawal of Russian support made Vladimirescu seek a new agreement with the Ottomans, leaving him to be executed by an alliance of Eterists and weary locals (alarmed by his new anti-boyar program); after the Ottomans invaded the region and crushed the Eteria, the boyars, still perceived as a third party, obtained from the Porte an end to the Phanariote system.