If the US could achieve dominance at sea, then the war would be very difficult for Britain to win. I don't see them being able to achieve dominance at Sea though, due to at the time Britains policy of having the largest navy in the world by atleast doubling the 2nd & 3rd largest navies was in full effect.

If however, America or an Ally of America was able to open up multiple fronts large distances apart, the Empire wouldve been stretched incredibly thin (As was evident when Britain was fighting in Europe, North Africa & Asia in WW2)

Not to mention, the majority of Britains industry was a long, long way away from America & so practically impossible for America to destroy. (Especially considering Long Range bombers that could go from America to Europe were practically non-existent)

in the 1930's cv's were still being "tested & redesigned" for the most, keeping up a coastal blockade with minimal air support would be a costly afaire.

this is a very interesting topic .... not sure how it woulda ended but after reading many of these posts i do believe that France, Britain and most likely Italy and Germany would have banded together against the western threat IMO. I suspect the US woulda been alone aginst too many enemies and looked at as Hitler's Nazi Germany during WW2

Hitler lost the war because he invaded Russia.

Back on topic, War Plan Red would have turned into USA vs Europe (the main countries anyway).

:EDIT:

During the 30's Britain also came up with their very own version of Blitzkrieg that would have defeated the conventional tactics that would have been used by the USA.

America wouldnt have been able to to open up 3 fronts, which is the point i was attempting to make earlier. In order to open up 3 fronts they would have needed to smash the Royal Navy decisively (Because as previously stated, Air Power wasnt advanced, at all, at this time) and i dont see them being able to do that. The Royal Navy was the absolute supreme naval power still at this time.

Once again, not to mention Britains allies. Even IF a 2nd & 3rd front could be opened, Britain, the Dominions & her allies would likely be able to cope.

I would like to think America would get Allies if this were to take place, but given Americas isolationist policies i wouldnt see those Allies being worth very much.

I would be interested in playing a strategy game that simulated War Plan Red though :3

Couple things.

While not in the Wiki article, I believe the genesis of this (and other plans) was that the US had the suspicion that the UK would be the initiator of hostilities die to the fact that the US was developing parity in naval strengh in the post WW I period and the UK would not stand for that..

I am not sure where your getting your numbers for force levels Sindher. The various Naval treaties of the period had put the US and the UK on a rough parity in terms of Capital ships. My cursory search suggests that the UK did have an advantage in light cruisers and destroyers. However, that advantage would be negated considering the many force requirements for these combatants across the British empire.


On the other hand, I have a hard time believing the US Army of 1930 would be capable of any kind of invasion of Canada. They weren't even ready for WW2 in 1940.