The magnitude of what just happened may take some time to sink in. This is the first time Iran has struck Israel after Israel struck another country’s territory (that is, not Iran).

This means that the battle lines have been moved.

Iran’s deterrence had already been restored in the sense that Israel knew that any strike on it would be responded to.

But now, Iran has proven that it will also respond to Israeli strikes on Lebanon.

This is the first time in decades that a regional power has the means, capacity, and willingness to put hard power against Israeli military maneuvers or aggression against a third party.

Whether this would extend to Palestine is uncertain, but if it does, it may prove a game-changer.