Tsaritsa. Czar (Tzar, Tsar) was equivalent to an emperor. "Upon annexing Crimea in 1783, Catherine the Great adopted the hellenicized title of "Tsaritsa of Tauric Chersonesos", rather than "Tsaritsa of the Crimea", as should have been expected." (2008, wikipedia) People commonly refer to Czarina as the female version, but this title is for the wife of a Czar. (see http://en.wikipedia.org/wiki/Czar) (see http://en.wikipedia.org/wiki/Tsaritsa)

Vladimir of Kiev probably did not fight against the Byzantines. He fought against other Slavic peoples. It was said that Vladimir of Kiev seized the Byzantine city Chersonesos in southern Crimea and agreed to evacuate the fortress of the city in exchange for or the hand of the sister of the emperor Basil II, Anna Porphyrogenita. To achieve this despite Byzantine opposition, Vladimir was converted to Orthodox Christianity and Christianised his Rus.'

Because thre is no Byzantine record of a seizure of Chersonesos by Vladimir of Kiev, histiorians think that this refers to an event which occurred later in history, in the Rus'-Byzantine War (1043), which was fought by a different Vladimir: Vladimir of Novgorod. Moreover, all Arab sources told a different story about Vladimir's conversion to Chritianity. Basil II faced an internal rebellion and turned to Vladimir of Kiev for help and Vladimir agreed in exchange for the marriage and also accepted to convert to Christianity. Once he got married he sent troops to put down the revolt.

We, Nicholas II by the Grace of God, Emperor and Autocrat of all the Russias, of Moscow, Kiev, Vladimir, Novgorod, Tsar of Kazan, Tsar of Astrakhan, Tsar of Poland, Tsar of Siberia, Tsar of Tauric Chersonesos, Tsar of Georgia, Lord of Pskov, and Grand Duke of Smolensk, Lithuania, Volhynia, Podolia, and Finland, Prince of Estonia, Livonia, Courland and Semigalia, Samogitia, Belostok, Karelia, Tver, Yugra, Perm, Vyatka, Bulgaria and other territories; Lord and Grand Duke of Nizhni Novgorod, Sovereign of Chernigov, Ryazan, Polotsk, Rostov, Yaroslavl, Beloozero, Udoria, Obdoria, Kondia, Vitebsk, Mstislavl, and all northern territories; Sovereign of Iveria, Kartalinia, and the Kabardinian lands and Armenian territories - hereditary Lord and Ruler of the Circassians and Mountain Princes and others; Lord of Turkestan, Heir of Norway, Duke of Schleswig-Holstein, Stormarn, Dithmarschen, Oldenburg, and so forth, and so forth, and so forth.