I was the lesser half of that project, but I didn't want to confuse the issue. The vast majority of info is accurate historically speaking, but it can be hard to sift the fact from fantasy on occasion; one website has already copied the text verbatim as 'the real deal' of the Invasion of Abyssinia.
If I recall correctly the only fantasy/alternate facts as regards the Abyssinians is the 'armoured force'. In reality they had three (?) Fiat 3000 and that was it. Otherwise it's all kosha as far as I remember.
Even the British and French are accurate for the time, although British tanks in ME Command were a bit sparser in reality as they would have been divided by the need to defend the Italo-Egyptian Border and of course there was an ongoing revolt in Palestine.
We went for 'counter-factual' as opposed to 'alternate history' in the main though and almost all the French and British options were deployed to the region in reality; albeit the French had to be beefed-up slightly.
Just the same though, I would fact check if you're doing the real thing.