GDG- Cava;ry ops

[gary.mcginnis at dot.gov]

If the Cavalry is supposed to screen the AOP and ensure that no force
moves on the left or right how do you avoid a fight if that force is
found?  

In other words was the battle of Hanover legitimate course of action?

   "The major-general commanding directs me to say that it is of the
utmost importance to him that he receives reliable information of the
presence of the enemy, his forces, and his movements.  His projected
movement is toward the line of the Baltimore and Harrisburg road. ....

 He looks to you to keep him informed of their movements, and especially
that no force concentrates on his right, in the vicinity of York, to get
between him and the Susquehanna, and also that no force moves on his
left toward hagerstown and the passes below Cashtown.  Your cavalry
force is large, and must be vigilent and active.  The reports must be
those gained by the cavalry themselves, and the information sent in
should be reliable.