What was the longest battle in ancient Greece

The Messenian War was the longest running war in ancient Greek history. Even though the war stopped and started over the centuries, hostilities between the states of Laconia and Messenia were constant, even to the point of Sparta officially declaring war on Messenia every year, regardless of their current relationship. This was done to allow Spartanites the legitimate right to kill Messenians if they so chose, and not offend the gods. The very religious Spartans didn’t want to give an excuse to the gods to disapprove of what Sparta was doing. This war was dated somewhere between 743 and 710 BC.