I agree with B Word that We should've had / bought CASTOR back in the good ol days of the Cold War and some EW / ELINT strength akin to what the 1st MIB had under V Corps and V II Corps as well as other assets not including the RC-12 and RU-21 at the time. I found it odd as the AAc and the British Army at that who are/were the best alongside the USAREUR wouldn't have had airborne battlefield EW assets.
Now suddenly we've bought Shadow in last few years of which the likes of the US Army has had SEMA assets for over four if not five decades though granted the USAF has only had MC-12W Liberty in the last decade of so operating out East
so guess we're not so behind
Good luck to Sentinel and hope this is a stay of execution post 2015
Oh and surprisingly the French don't have much EW / battlefield assets so what's happen to 'Horizon' - AS-532UL then?
Cheers