Peace with the Byzantines was then officially made. Maurice, for his aid, received much of Sasanian Armenia and western Georgia, and received the abolition of tribute which had formerly been paid to the Sasanians.[9] This marked the beginning of a peaceful period between the two empires, which lasted until 602, when Khosrow decided to declare war against the Byzantines after the murder of Maurice by the usurper Phocas.[22][23]