After this, Cleomenes, having been defeated in a great battle at Sellasia, forsook Sparta and sailed off to Egypt, and Antigonus, after having accorded to Aratus fair and kindly treatment in every way, led his army back to Macedonia.
Edition :
Plutarch. Plutarch's Lives. with an English Translation by. Bernadotte Perrin. Cambridge, MA. Harvard University Press. London. William Heinemann Ltd. 1926. 11.
Remark :
date: It is uncertain whether the battle took place in 222 or 221 BC, see http://referenceworks.brillonline.com/entries/der-neue-pauly/sellasia-e1107580. long-term consequence: After Cleomenes had lost the battle, he escaped to Ptolemaios III Euergetes.