1.6 & 1.7 are standard map settings. 

1.8 & 1.9 unkown experiment with backround music. evil wind, hangars & forest and similar sounds.
But i dont know if MP match is working with it. So ive let old versions in pack without music
on backround mission.

1.8 & 1.9 USA stronger. One group repaired. USA now have more shermans than obsolete M3Lee in times of panther and tigers. 

 - Markis 