One piece of advice: never waste your squadron prestige on ground offensives; always save it to obtain new aircraft early.


Also, what types of missions are you flying?  If you are only flying fighter sweeps, you can't expect the front to move at all.  You should only fly anti-shipping, stikes on factories and such, and the occasional brige-busting mission.  Also, as soon as an invasion starts, fly CAS missions nonstop until the enemies have been pushed back into the channel, or if its a freindly invasion,  you have pushed the front nearly to the German border.