On Track to the Jagdpanzer E 100: Missions

Velvet_Ewok, on Jan 19 2014 - 15:39, said:   Sorry...I'm slow.   Does this mean that the per tank rewards apply retroactively to tanks that have been played and elited (i.e. meet the XP requirements) BEFORE the event, or only to tanks that were played and met the XP requirement DURING the event?   Example:   If I played and met the 31100 XP requirement on the Stug III 2 months ago, do I qualify for the Combat mission: Reaching Your Jagdpanzer IV reward or do I have to go replay the tank once the event starts and grind out the 31100 XP in order to qualify?