Art De La Guerre

[Za Otlichiye]

In addition to in melee, melee support, and simple support, there is non-fighting contact (p. 51). But I was startled to discover when studying the example on page 66 that there is a fifth category, attacking. This is a unit in melee support position against enemy unit A, but itself contacted on the flank or rear by an enemy unit B's front edge. As such, it still counts as a flank or rear attack against unit A, reducing (if non-light and fully conformed) A's factor to zero and cancelling many special abilities. However, it does not add its own factor+1 to the combat against unit A. And it fights unit B with flank and rear attack penalties itself.
This does not appear in the main text, only the illustrated example. And unfortunately in the example, Cv1 has no special abilities to cancel and its factor is zero before reduction to zero. But thems the rules, maybe.