Complex sentence: In 1008, the Bagratid ruler Bagrat III united the kingdoms of Abkhazia and Georgia into a single Georgian feudal state, which reached the apex of its strength and prestige under the queen Tamar (1184-1213).
Split into simpler sentences: In 1008, the Bagratid ruler Bagrat III united the kingdoms of Abkhazia and Georgia into a single Georgian feudal state. This state reached the apex of its strength and prestige under the queen Tamar (1184-1213).