The modern air force would wipe out the ww2 air force, break for lunch, then the ground forces would start getting pummeled by precision munitions fired from outside the range they can retaliate at.
If the modern air force can take out some modern ground troops, the ww2 ground troops could loot their corpses to be somewhat modern-ish ground troops. The modern air force could use radio to explain how to use the equipment, if they have access to wikipedia.
The modern air force would wipe out the ww2 air force, break for lunch, then the ground forces would start getting pummeled by precision munitions fired from outside the range they can retaliate at.
Meanwhile, ww2 ground forces would be very bored.
If the modern air force can take out some modern ground troops, the ww2 ground troops could loot their corpses to be somewhat modern-ish ground troops. The modern air force could use radio to explain how to use the equipment, if they have access to wikipedia.