Sorry, but no - Yugoslavia even before Anschluss was falling out of little entente, formally maintaining membership only for purpose of maintaining preferential treatment from Czechoslovakia in military equipment and industry help. It's membership was half-hearthed after Alexander's assasination.
As for French army performing better or not, I was referring to counter-offensive that French army mounted in order to help Poland, which did not achieved anything.
USSR could have sent troops through Romania(there was no other way except Poland really) but the transport network would make this line very thin. Considering all the equipment (starting with small arms ammunition and aviation fuel incompatibility), this would not be all that helpful. I'm not entirely sure if going through Hungary would help all that much, because bottleneck may have been the mountains in the border areas.
It all depends which point in time are we discussing - right after Anschluss, southern border was completely unfortified(some mobilization plans were even counting on invasion of Austria in case of conflict with Germany, but this was cancelled after Anschluss as it become completely unrealistic), but this was to some extent remedied by the time of Munich crisis.
Germany had massive mobilization potential. And it would be choosing time and place of start of war.
As for the tanks, they would not have played all that important role - there wasn't enough of them, with little hope to get more once war start due to mobilization and likely loss of factories, and largest unit was brigade. Forget any spearhead breakthrough attacks. Also they were light tanks, essentially armored against machinegun fire - hit from any gun would take it out.
As for holding for three months - the problem really is the three-sides envelopment. Czechoslovak general staff was realistic enough about this, and major defensive battle was not planned for before Bohemian-Moravian highlands, which would be the line to hold in case of success, in case of failure, retreat to Slovakia.
As for plots to win Polish favor, they were desperate attempts to secure at least part of depressingly long border. Poland had no intent to help Czechoslovakia and was at the time amusing itself with thoughts about German-Polish pact against bolsewism(and had non-aggresion pact in any case).
Plans for fortifications were meant for the time when those would be complete. But they were never completed. And to be honest I don't really recall about them being intended to hold for six months, and I am highly skeptical that anybody would expect that after Anschluss(before, maybe).
As for Hungarian question, little entente was intended to prevent return of Habsburgs to throne(keep in mind that their return to throne would revive claims for land belonging to little entente members), which it did. It was never intended to counter Germany, and Yugoslavia especially had no will to fight and bleed in what they perceived as German-Bohemian issue.
It doesn't matter all that much whether Italy was or was not in alliance with Germany, it was opportunistic country that would want to pressure French if it could. Simple truth is that for French alone, blocakade of German traffic would be ineffective and it would be unable to ignore significant Italian navy in the mediterranean. This would make French naval communications vulnerable to corsair ships that were relatively ineffective against UK.
I agree with what you say about betrayal, but it was not done only by French, but also UK, Poland, and Yugoslavia. Though all had understandable reasons for it, it is clear in retrospect that it was folly(and I think this lesson was well learned and is behind current relatively stable stance on Crimea and such).
As for the inter-nationality relationships and feelings, well that can help to some extent, however all it means in reality is that part of the tropps were not as reliable in all situations. By the way, large german minority meant there was some issue with part of the manpower, which was more affecting some specialist professions (such as drivers) because german minority was generally well trained.
By the way, I'm not sure if we may be getting too off-topic, if mods would think so, I'll stop here.
'Little Willy' was the slightly insulting term used to refer to the Crown Prince in WW1 by the British. I was just wondering, in the context of a 'Return of the Hohenzollerns' scenario which one you would use.
