The prospect of a full-scale war between Israel and Lebanon’s Hezbollah militia terrifies people on both sides of the border, but some see it as an inevitable fallout from Israel’s ongoing war against Hamas in Gaza.

Such a war could be the most destructive either side has ever experienced.

Israel and Hezbollah each have lessons from their last war, in 2006, a monthlong conflict that ended in a draw. They’ve also had four months to prepare for another war, even as the United States tries to prevent a widening of the conflict.