(This is what happened in my "first time" game in which I admittedly was grossly incompetent. Now I am merely imcompetent

Rather than defending Barvenkovo, wouldn't it be better to provide bus service to the advancing Germans, and usher them into the town? During the early turns, build defenses just north of the river, hope they take Barvenkovo immediately, thereby permitting a more elastic defense between Barvenkovo and Izyum and the river line to the west? Of course artillery can be used in the very early turns to demolish a few fortified hexes for minor VPs while swinging the far western part of the 9th behind the Barvenkovo river and digging in. And the bridges around Barvenkovo should be destroyed.
Also, why won't it let me make hedgehogs on the border?
Critique and pointers about the above comments & defending this general area from the coming meat grinder eagerly solicited. Be as brutal as the Axis will surely be, heh heh. I want to learn.