>>18423394
Good question, I thought the Romans were god tier soldiers. I guess when you expand so far out the heartland becomes soft and doughy when you can rely on foreign mercenaries to fill your ranks.

>>18423394
>airforce
Good designs, experienced pilots, debatable tactics, terrible industrial output
>land army
Mediocre to bad designs, mediocre to bad tactics, terrible industrial output. Definitely the worst of the three
>navy
High tier, mogs the KMS and IJN in terms of accomplishments, very relevant strategically, could fight toe to toe with a far superior navy

>>18423394
Because it was, as it still is, an agrarian country, that at the time was way behind in industrialization.

>>18423623
And with a ton of inefficiencies, red tape and criminal influence (not just the mafia, if only it was just them).