No More Learning

All this must have been done at the instigation of Valentine, who
after           operations against the Arabs returned to Constantinople
with a guard of 3000 men and forced Constans to give him the rank of
Caesar (early in 643): but on strong opposition manifesting itself a
compromise was made, whereby he gave up this title, but was made
commander of the troops in the capital and gave his daughter in
marriage to Constans.