One initiating attack runs in, dagger unsheathed, two seconds before other ranks (9)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

( R [runs] contained in [in] AGGE [letters remaining in D AGGE R when the outer letters D and R are removed [unsheathed]) + ( S [second] + S [second], giving seconds) + OR (other ranks)