Popular Archaeology has a good essay on the several destructions of ancient Gezer:
The archaeological excavations being conducted at the site of ancient Gezer in northwestern Israel have recently revealed some tantalizing finds, one of which came as a surprise to excavators who just completed digging there during the summer of 2013.
“In this, the sixth season of excavation,” reports co-directors Steven Ortiz of the Southwest Baptist Theological Seminary and Samuel Wolff of the Israel Antiquities Authority, “one goal was to remove a portion of the city wall built in the Iron IIA period (10th century BCE) in order to investigate a Late Bronze age destruction level (ca. 1400 BCE) that lay below it. To the surprise of the team, in the process of excavating the city wall, an earlier wall system dating to the Iron Age I (1200-1000 BCE) was discovered.”*
The finding is significant in that it could provide possible new additional insight and evidential support for events recorded by the Biblical text relating to the king of Gezer organizing a Canaanite coalition against the Hebrew leader Joshua, and David’s battle with the Philistines where he pursued them “all the way to Gezer”, implying a close relationship between Canaanite Gezer and the Philistines during this period.
… More information about Gezer and the excavation project, and how one can participate, can be obtained at the project website.
And more on the site at the first link.