vaalen wrote:What counter measures did you develop?
I typically use the forces that show up in WV supplemented by perhaps a brigade or two, to form a screen along the railway between Grafton and Harpers Ferry, set to attack, so long as fair weather holds. Each area has a strength of only about 100 pwr but they usually leave it alone.
I also try an early move on Manassas with a blockade of the James and Rappahannock to diminish their supplies in VA.
The AI seems to value stealth in its early moves for any raid and if checked it will abandon them.
In Ky gunboats on the river and militia converting military control seems to check raids and a cannon or two in a few of the towns on the rivers stops them from chancing using the rivers.
Some of it could be luck, but I have not had a single deep raid since I started using these methods.