 The Thracesian Theme (, ), first mentioned clearly as late as c. 740, was the successor of the Army of Thrace, and covered the central western coast of Asia Minor (Ionia, Lydia and Caria), with its capital most likely at Chonae.The Opsician Theme (, ), first mentioned in 680, was constituted from the imperial retinue (in Latin ).It covered northwestern Asia Minor (Bithynia, Paphlagonia and parts of Galatia), and was based at Nicaea.