Larry said:
So what happens in this situation? The path would be L3, M3, but cannot reach the building in M1. Is he forced to move into M2 and suffer interdiction, or does that cause the surrender, too?
Note that this situation is different in a couple of respects from the original situation: firstly since the J4 unit is CX it does not qualify as an interdictor as per A10.532 v2 (in part) about halfway:
".... Similarly, a CX or Encircled unit, or a unit using Spotted Fire or one in Melee cannot Interdict an enemy unit ..."
And secondly, this situation falls in line with the EXC of A10.51 (near the end):
"....A routing unit may also ignore a building/woods hex if that hex is no farther from a Known enemy unit than its starting hex ..."
In this case the building in hex M1 is not farther from a known enemy unit in J1 than the DM leader's starting hex in K4 (it's actually closer in fact, 3 hexes vs 4 hexes). Thus, M1 can be ignored, and since there are no other woods/buildings within 6 MF that I can see from the diagram ....
.. So .. in this case the routing unit must abide by rule A10.51 first sentence, second paragraph:
"...If no non-ignorable building/woods Location can be reached during that RtPh, a broken unit may rout to *any terrain hex* consistent with the above restrictions..."
Note, this rule was originally introduced in the Chapter "F" desert section, since desert boards typically have no woods or buildings for rout destinations, but this rule sometimes applies to the regular boards as (in situations like this) well. So, IMO the DM Leader can choose 'any terrain hex' and rout to it 'consistent with the above Limitations' .. Limitations basically meaning 'consistent' with the rest of the rout rules.
Now, in my opinion 'any terrain hex' should even include open ground hexes (as I see open ground Locations as a type of terrain hex: and, in fact, there is even a definition for it in Chapter B section 1). I submitted a long list of QA to MMP a year ago, (like 7/8 pages) and that was one of my questions, obviously though this (routing to an open ground destination)would obviously not be in the routing units' best interest most of the time, except maybe in desert scenarios (since 99% of the time we have desert open ground and thus no good choice of rout destinations most of the time).
Anyway, I say the DM leader is not eliminated for FTR nor must it surrender, and can in fact rout, or low crawl at its option to any 'terrain hex' as long as it's not decreasing range to KEU, ending the RTPh ADJACENT to a KEU ... ('consistent' with all the other rout rules in other words).