Possible, but still risky since Germany engaged in unprovoked aggression.
Agreed but Austria may consider it has no choice.
Could Britain supply the Dutch with its navy in this TL?
That could get very messy as RN forces would be exposed to attacks by raids by German forces, possibly most deadly by their BC force as the supply lines. I suspect, given the gungho attitude of much of the RN - not hindered at all by the current 1st Lord of the Admiralty and public opinion - they would seek to support the Dutch. Germany might inflict some heavy losses although it could prompt earlier discovery of some of the RN weaknesses - poor shells, bad anti-flash procedures, lack of night fighting training/equipment etc. A lot would also depend on how much Dutch and Belgium territory is in EP or CP hands.
It's likely that after some bitter fighting - or fairly quickly if the Dutch are taken by surprise - they will be overrun. However that still means that Dutch forces and external resources - such as their merchant marine, the DEI etc will be on the allied side and the allies won't have to allow commercial trade to a neutral Netherlands as OTL. The Germans will also here have to feed the occupied population which could be bad for their as their likely to come a distant 2nd to Germans.
Worth noting that if the French enter the war, the Germans might try preempting them by occupying as much of Belgium as they could beforehand. Would also make sense since the Germans might dream about annexing northern Belgium into the German Reich as well.
Very true. The OP only mentioned the Netherlands but given the size of the German army and the importance of their plans for a quick attack on France its likely that they would also seek to secure at least part of Belgium. Possibly with some diversion of forces from the planned defensive units in A-L they could do a full Schlieffen Plan attack in which case does the BEF go to Belgium via France or possibly to the Netherlands? I suspect the former as there were draft plans drawn up for that and presuming that both nations [Belgium and Netherlands] are being invaded at the same time Belgium is more critical to British interests - both keeping its ports out of hostile hands and keeping France in the war. Also while we know there was the treaty guarenteeing the neutrality and independence of Belgium I'm not sure whether the same applies to the Netherlands while might be a factor in moving public opinion in support of fighting,
Yep. Does this mean more starvation in Germany?
Would depend on two primary factors:
a) Do they make the same mistakes of over-concentration on the army with men and horses especially moved away from agriculture and later L& H's massive military programmes which worsened the problem? - Almost certainly the 1st.
b) How long does the war last? - Probably significantly shorter so Germany doesn't suffer as much overall.
However definitely going to be worse in the duration of the war because the Netherlands won't be a supplier either of any surpluses they have or a back door for bypassing the allied blockade.
Overall however I don't think things would last long enough for as many deaths as generally reported OTL.
Let's say that this is after the Second Balkan War. And Yes, Serbia might very well decide to attack A-H in this TL if it has French, Russian, and British support.
I think they would consider it but they might also need some urging. While their won both wars and made substantial gains there have been costs and attacking into Bosnia and possibly Croatia - which is unlikely to welcome them - is a lot more difficult than defending their homeland. Also with Greece under a neutral/pro-German monarch [depending on which source you use], Romanian having a pro-German king, at least for a while their exposed and as OTL might suffer an attack from Bulgaria as well. Although for Bulgaria it would be a gamble as the CPs would look markedly more vulnerable here. Possibly Serbia joins after Italy or a bit later when its seen that the CPs are really struggling. [Well that would probably be my choice if I was in command of Serbia in this scenario but then I have the small edge of 100+ years of hindsight.
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Agreed. And it's "you're" rather than "your".
True. But what' a little grammar between friends.