MA gameplay is sort of hard to define honestly.
field capture has been defined by HiTech himself as a device to promote engagements.
"winning the war" is where 1 country takes the majority of the bases, I forget the exact numbers, but IIRC we will use the rooks in this example. The rooks must "own" 60% of the knights fields, 60% of the bishops fields, and 100% of their own fields.
those %'s may be wrong, but it is not documented on the HTC help page I see.
those numbers are based on the countries "home" fields, which are decided when a map first comes up. each team starts with an equal number of bases.
the way to capture a base is to destroy every building in the town, then have 10 troops get into the map room while those buildings are still down. for bases without towns like vehicle bases all the ack must be down (so they don't kill the troops) and 10 troops must get into the map room.
there are many other aspects to the strategic gameplay, and many in-game disagree which is the beast and most fun method, but that is the basics.
besides the different thoughts on the best way to "win the war" people differ on what is "fun". some like to bomb bases, some capture fields, some furball, some just use GV's, it is almost endless.
what is the real point of the MA? find what you find is fun and do it. don't worry what others think about it, do what you enjoy.
