[raketenjagdpanzer]

A couple of thoughts spring to mind...

I think things would get very ugly on the Swiss border. I think you'd have friends and families trying to get "guests" from abroad into Switzerland and it would create a horrible humanitarian crisis - the refugee camp scene we've seen all over Africa and southeast Asia and occasionally in southeastern Europe now in the heart of Europe itself.

The Swiss government would harden it's heart: allowing that flow of refugees in would likely create a host of problems. Firstly, and most importantly, stressing out the resources. Secondly, bringing in disease. Thirdly, suddenly finding yourself a transportation hub and therefore a target of enemy (in Switzerland's case, everyone would be an enemy during the Twilight War) action.

I can see the relatively undamaged French making the Swiss an offer they can't refuse (much as they did Belgium), or alternately the Swiss turning to a very nasty sort of legion e'tranger - send out agents, hire freelance ex-Bundeswehr and ex-USAEUR x years of service to keep the "rabble" off the border in exchange for citizenship.

The Swiss AF would be flying a few F/A-18s (they were license built between 1996 and 1999; I think we can safely assume construction would crawl to a halt after the nukes fly) and a lot of F5s (50+) - they only have a few hundred miles to fly across the entire country so rather like France they'd still have an operational AF to keep refugees from trying to sneak over the border in light aircraft, or to "escort" the occasional French probing flight back across. They also have a not inconsiderable number of Vampires, Hawker Hunters and DeHavilland Venoms to use for observation, reconnaissance and ground attack.

Swiss ground forces equate to - when all reserves are called up - something on the order of eight to ten NATO pre-war divisions (200,000 +/- personnel). They're broken down into brigades. It's an armor-heavy army. Switzerland operates (at the time of the Cold War) 380 "Pz 87" PzKpfw Leopard IIa4's, 580 M113 (build unknown probably to A6 standard). Deliveries of CV90/CV2000 started in 1993; the Swiss purchased 186. They also built 515 MOWAG Piranhas for themselves. They have some 330 MOWAG Eagles (up-armored midrange semi-trucks for armored recon work), a whopping 224 M109A6 SPHs and 120 Piranha TOW-II vehicles.

This is fairly formidable, moreso when you consider all of this can use NATO ammunition.

What Switzerland does not have is oil. The Swiss would quickly find their pristine, untouched armored and air forces nearly unusable except in the most dire circumstances unless they cut a deal with the French for POL. Would they give up their own neutrality? That's an interesting question.