Where could they have got pilots and planes?
If they did does it change the outcome?
If they did does it change the outcome?
Pilots aplenty through the Int'l Brigades and local volunteers BUT buying the planes was dfifficult due to the arms embargo and the Republic being flat broke.
As mentioned before, France could've fronted them a few squadrons of D 520's and MS 406's and made the attacks on Guernica or Madrid a turkey shoot of Stukas and medium bombers and shown the Germans how blitzkrieg falls apart w/o close air support.
Of course, AdA tactical doctrine and repair/rearmament turnaround time needed major work, which involvement in the SCW would've shown the need to do vs the Kondor Legion.
Whether they'd address that needs is a matter for the audience.
IF they do, then the Battle of France becomes a much harder slog for the Germans w/o air superiority.
Say the US politely ignores the British arms embargo and sells the Republic some P-36 Hawks, P-39 Aircobras or Brewster Buffaloes.
Not great planes, but with capable pilots, could contest the skies with the Me-109 and shoot down a Stuka w decent chance of success. P-40's would have a field day, but IDK if they'd be available.