The smoke created by the explosion, continues to grow as a cloud, and it'll be a few moments still until it is clear enough for you to even be able to march throuh without impaling yourself by accident. And so, you must think of what to do now; already, your split force begins to ride towards you, but they are yet some distance away; if you wait for them to arrive, you give the enemy time to form up behind your opening, to leave their positions in the gatehouse and meet you arms in hand.

And of course, there is also the matter of who shall go first...

CHOOSE YOUR OPTION
>We must not give them any breath; assault forth! (Choose which unit shall go through first)
>Better to wait until our fellows arrive before attacking in full.
>Write-in