RUR starts to attack the EU with a triple pronged attack from three different army cores, the total number of troops coming into a little under 1,000,000 very angry veterans equipped with the latest composite breastplates and some exoskeletons. The veteran cores quickly over run most of the early defenses of the EU (it's great to be seen as friend on friend or foe ID systems).
Oh did I mention we're launching nuclear WMDs to strike at major EU cities? Yeah, we launched 3 nukes at their major cities, deal with it.