@Thammuz I have no doubt that they’d react, but consider a possible scenario:
A Libyan attack force (50 guys, 40 rifles and a couple of boats) lands on the French Riviera just after dawn. A diner at a seaside cafe notices the hubbub and calls the local gendarme, who phones in to his superiors, who don’t believe him. An hour or so later three more policemen arrive on the scene to find no one around, and the street deserted. The alert is called off.
How long before the Army is called and has time to check the train schedules?
I’m assuming that the Libyans wouldn’t attack with much greater force. If it had been 500 men, then the call to the gendarme wouldn’t have been made in the first place.