>>63897980 (OP)thats a vague and unhelpful question
its like asking "Can you win a war without artillery superiority?" or "can we win when outnumbered?"
but the short answer is: yes but its hard
the longer answer is: it depends on the country
if the US could not take and hold global air supremacy, then their options would be to wage a long air campaign aimed at seizing it from the enemy, with coordinated strikes against enemy airfields and fuel logistics to cripple enemy air power
so when boots touch the ground, it will be after they had seized at least air parity
the second option is to fight a much more limited ground war and concentrate their air power where possible to create localized conditions of air superiority even when theatre wide air superiority cannot be reached
the enemy can be defeated in detail over areas where superiority can be gained and then expand outwards as air power expands
for the soviets/russians air power is simply an additional dimension to the ground battle
whereas the US considered the skies a theatre on to itself
so if they cannot take air superiority, then they will generally choose to just limit what the enemy can do with that superiority through the use of tactical air cover and as many AA assets as they can concentrate over areas they intend to maneuver through