Greek seals from the theme or from the ambiguous "Interior Iberia" can seldom be dated precisely. Although many scholars maintain that the theme was probably created immediately after the annexation of David of Tao's princedom, it is difficult to ascertain whether Byzantine rule extended into Tao permanently in 1000 or only after Georgia's defeat in 1022. It is also impossible to identify any commander in Iberia before the appointment, in 1025/6, of the eunuch Niketas of Pisidia as the doux or katepano of Iberia. Some scholars believe, however, that the first doux of Iberia was either Romanos Dalassenos or his brother Theophylactos appointed between 1022 and 1027 in the aftermath of Basil's Georgian campaigns. After 1045 Iberia also included the former Kingdom of Ani. Since 1071 Gregory Pakourianos was a governor of the Theme of Iberia. The Iberian governor was aided by tax officials, judges, and by co administrators who shared in the exercise of the military and civil duties. Among these officials were the domesticos of the East, the administrators of the districts of which the theme was composed, and the occasional extraordinary legates sent there by the emperor. Apart from the regular Byzantine garrisons, an indigenous army of peasant soldiers guarded the area and received in turn an allotment of tax-free government land. This changed, however, when Constantine IX Monomachos (1042–1055) dismantled the army of the theme of Iberia, perhaps 5,000 men, converting its obligations from military service to the payment of tax. Constantine dispatched Nikolaos Serblias to conduct an inventory and to exact taxes that had never been demanded previously. End of the Theme Constantine's reforms caused great discontent in the theme and exposed it to hostile attack aided by the removal of regular troops from the region, first to crush the Macedonian revolt of Leo Tornicius, himself the former catapan of Iberia (1047), and later to halt the Pecheneg advance. In 1048-9, the Seljuk Turks under Ibrahim Yinal made their first incursion in this region and clashed with a combined Byzantine-Armenian and Georgian army of 50,000 at the Battle of Kapetrou on September 10, 1048. During this expedition, tens of thousands of Christians are said to have been massacred and several areas were reduced to piles of ashes. In 1051/52, Eustathius Boilas, a Byzantine magnate who moved from Cappadocia to the theme of Iberia, found the land "foul and unmanageable... inhabited by snakes, scorpions, and wild