Iran's so-called axis of resistance is a loose network of proxies, Tehran-backed militant groups, and an allied state actor. The network is a key element of Tehran's strategy of deterrence against perceived threats from the United States, regional rivals, and primarily Israel. Active in the Palestinian Occupied Territories, Lebanon, Iraq, Syria, and Yemen, the axis gives Iran the ability to hit its enemies outside its own borders while allowing it to maintain a position of plausible deniability, experts say. Since the Islamic Revolution in 1979,…