Hi,
If you have all mission unlocked you can replay any mission you want. Replaying a mission only overwrites the saves of the
mission you played previously. So if you where still on mission 6 but did not finish it and replay mission 3, you still can go
back to six but you will start at the beginning. If you go back to 4 after playing six, you will start at the beginning.
Your weapons and dogtags will not be touched. Once you get them you will keep them although sometimes a glitch might occure,
syncing these to battlelog. Ingame they will be there. In some cases you might even find a dog tag that you already unlocked (and
should not show up) but is still in the mission.
when the campaing has not been finished it should allow you to replay those levels you finished. When you want to finish the campaign,
start the last level you unlocked and play further through the campaing.
