Original sentence: After his brother's death in 1380, Matthew Asanes Kantakouzenos governed Morea until the appointment of the new governor Theodore I Palaiologos, in 1381, and his arrival in 1382.Before full transition of power in Morea from family Kantakouzenos to that of Palaiologos Matthew has resign his power in Morea to son Demetrius I Kantakouzenos.Compelled to abdicate, he moved to Morea, in 1361, and assisted his brother Manuel Kantakouzenos in its government
Edited sentence: After his brother's death in 1380, Matthew Asanes Kantakouzenos governed the Morea until the appointment of the new governor Theodore I Palaiologos, in 1381, and his arrival in 1382.Before full transition of power in the Morea, from the Kantakouzenos family to that of Palaiologos, Matthew resigned his power in the Morea to  his son Demetrios I Kantakouzenos.Compelled to abdicate, he moved to the Morea, in 1361, and assisted his brother Manuel Kantakouzenos in its government