June 18 (UPI) -- Unlike its Lebanon intervention in 1982 and the current conflict in Gaza, the principal wars Israel fought were very short and one sided: 1956, 1967 and 1973. How long the current battle with Iran lasts and how it ends are unlikely to be decided after a few days of fighting and aerial combat. But among the "unknown unknowns" former U.S. Secretary of Defense Donald Rumsfeld was fond of assessing, here is one to consider. Is this war possibly the last crusade against state-