France won't and German can't?
You think after UK leaving the EU members won't answer a call of arms from a member against UK?
Come, if you want war it's easy to go. EU was here to prevent war, so war seems like the only real possibility after leaving.
And if you like facts so much go check this ranking and tell me again that France plus Germany plus Spain is not enough to put UK back to its place.
http://www.globalfirepower.com/countries-listing-europe.aspGerman armed forces are neutered, per their post WW2 constitution.
France has no national interest in helping reclaim Gibraltar. Doing so would be against it, as it goes against the principles of diplomacy to assist Spain in reneging on their perpetual concession.
UK's Navy is top notch; Thatcher saw to that after the (relative) difficulty of retaking the Falklands.
Spain's Navy would quickly join its antecedent Armada on the seafloor, in Davy Jones' Locker.
Comparing Falklands to a fight against whole Europe... That's why old people shouldn't vote.
"Whole Europe" would not help Spain go back on its word, in violation of longstanding Treaty.