One big thing to do first in online mode is to well know the maps .
I know that I could walk and explore in them alone in a private match. But it's boring...
I began to play the campaign mode to learn the places where the game is.
I only played about the half of the first mission and I didn't recognize a map that I've play on-line.
Does the on-line and campaign mode places are related ?
If I continue to play in campaign mode, will it help me to know maps used on-line ?
Will I be able to recognize some spots that I have to be aware like windows of building ?