Carlo I was the son of Count
Leonardo I Tocco of
Cephalonia and
Leukas by Maddalena de' Buondelmonti, sister of
Esau de' Buondelmonti, ruler of
Ioannina. Leonardo I Tocco, who was count of Cephalonia from 1357 until his death in 1376, as well as duke of Leukas from 1362, was himself the son of
Guglielmo Tocco, governor of
Corfu for the
Angevins, and Margherita Orsini, From the beginning of his conquests, Carlo's army was composed mainly of
Albanians, and they were rewarded with lands held in fee. He intermittently became involved with the affairs of the
Principality of Achaea as well: in 1407–1408 his brother Leonardo seized and plundered the fortress of
Glarentza, in the northwestern
Morea, and in 1421 Carlo bought permanent possession of it from Oliverio Franco, who had seized it from the Achaean prince
Centurione II Zaccaria three years earlier. Achaea's main enemy, the
Byzantines of the
Despotate of the Morea initially seemed content to leave Tocco alone, given their shared hostility against Zaccaria, but war between the two powers was provoked in late 1426, when Tocco's forces seized the animals of
Albanian herders during the latter's annual migration from the Byzantine-controlled central uplands to the plain of
Elis. In 1427, the Byzantine emperor,
John VIII Palaiologos led a campaign against Glarentza, and in the
Battle of the Echinades, the Byzantine fleet defeated Tocco's own. This ended Tocco's ability to intervene in the Morea, and his possessions were liquidated in a negotiated settlement, in which John VIII's brother Constantine Palaiologos (later last Byzantine emperor as
Constantine XI) married
Creusa Tocco, Carlo's niece, and received Glarentza and the other Tocco territories as her
dowry.
Expansion in Epirus From 1405 Carlo controlled several fortresses on the mainland, including
Angelokastro. He was invited as the successor of his uncle Esau de' Buondelmonti in
Ioannina after the rejection of the latter's widow and son in February 1411. Nevertheless, he had to overcome the determined opposition of the
Albanian clans, and in particular of the ruler of
Arta,
Yaqub Spata. In spite of a victory over Carlo in 1412, the Albanians failed to take Ioannina. On the contrary, not long after Maurice died, and Yaqub was killed in battle in 1416, Carlo advanced on Arta and obtained its surrender in 1416. Arta was entrusted to Carlo's younger brother Leonardo II, and now the Tocchi controlled all major towns in Epirus. In 1415 he was granted the title
despotes by the
Byzantine Emperor Manuel II Palaiologos. Moreover, as part of the Byzantine tradition he adopted, he signed all his official letters and decrees in Greek. The privileged military class of the
stratiotai was found in particular amongst the population of Ioannina. In Carlo's army, the highest-ranking military officer was the
kapetanios (plu.
kapetanioi), and almost all of the important military and diplomatic actions were entrusted to these officers. The few known names of Tocco's
kapetanioi belong mostly to Italian nobles, and the Tocco greatly trusted their compatriots and family members. The second most trustworthy component in Carlo's army were the Byzantine Greeks, particularly those from Ioannina. After this came the Albanian warriors, who despite serving in the army of the Tocco, were commanded by their own archontes. Nonetheless, the archontes of both the Albanians and the Greeks were subordinated to the
kapetanioi. The only Albanian officer and vassal of Carlo Tocco who was considered loyal and trustworthy was
Demos Bua, who was entrusted with
Angelokastron, Katoche and their surroundings. Carlo would later station Albanians in the
Peloponnese, where he needed them as soldiers. Apart from his conflict with the Byzantine rulers of
Morea (the Peloponnese) over Elis, Carlo spent the remainder of his reign in relative peace. Although he had several illegitimate children, he was succeeded by his nephew
Carlo II Tocco, the son of Leonardo II. His niece Creusa Tocco (not Maddelena Tocco as was previously thought) married
Constantine XI. ==Family==