The U.S. has two massive bases in Andalucía that are pivotal to its Western Asian and Mediterranean operations. These are Rota near Cadiz and Moron, near Seville. These would be legitimate military targets if, as the Iranian high command have pointed out, a NATO strike against the beleaguered Syrian government turns the region into a ‘ball of fire’.
As has already been pointed out by top pundits, political and military, U.S. / UK aggression against the Syrian government could have a domino effect, drawing Russia and China in. Both have warships operating in the Mediterranean. Further to this, do not underestimate the Iranian arsenal. It will be no pushover and its reach is further than we think.