A unit (even a formed mortar) can spend its first MP to enter a hex and try to rally a friendly unit there, then spend a second MP to enter the trench (in the same hex) and rally a second friendly unit IN the trench, and finally spend its last MP to leave that hex and try to rally a third friendly unit in the ending hex.
Lots of things wrong with this example, but yes a single moving unit could rally one unit per hex it enters. Why only one? Because the stacking limit is two per hex. So, in the example you describe, the mortar could not enter the first hex since there were already two units present there.
The move score on a formed mortar should be one vice three.
Also, conceptually, the moving unit isn't "rallying" anyone. Rather, the dispersed units are rallying in response to the movement of a formed unit. At the time (1914-1918) practitioners believed that well disciplined troops in good order moving through remnants of previously shattered units would inspire/encourage those units to reform - whose to say they were wrong!
Last edited Thu Sep 15, 2016 2:04 am (Total Number of Edits: 1)