The Reconquista, a related movement, worked to reconquer Iberia for Christendom. He resisted Byzantine efforts to reconquer Syria by skillful defensive tactics and counter-raids into Anatolia. A failed attempt to reconquer Harran ended the Assyrian Empire. Babur and the remaining Timurids used this opportunity to reconquer their ancestral territories. Artaxerxes was compelled to retreat and postpone his plans to reconquer Egypt. Spain attempted to reconquer its former colony during the 1820s, but eventually recognized its independence. Thereafter, Khosrow seized the opportunity to attack the Byzantine Empire and reconquer Mesopotamia. Spain initiated military efforts to reconquer it during the 1820s. Meanwhile, Daenerys Targaryen continues her plan to reconquer the Seven Kingdoms. Maria Theresa later unsuccessfully tried to reconquer Silesia during the Seven Years' War. This victory allowed the Empire to reconquer progressively the Ethiopian Highlands. The Dutch intended to reconquer their colonial outpost in Taiwan. In 468, Leo unsuccessfully attempted to reconquer North Africa from the Vandals. They also attempted to reconquer the Balkans. He asked for 12000 Cossacks to reconquer Crimea.