http://img81.imageshack.us/img81/2025/besieged6pj.jpg
2x Lv3 attacks at the same time
EDIT: Also the system message...
http://img53.imageshack.us/img53/17/2forces6mt.jpg
(thought they were at Lv2 at this point, when they were infact at Lv3 as I noticed after I checked the Besieged map)
http://img157.imageshack.us/img157/936/5307zi.jpg
(and rising)