Keeping in mind that (per A15.3) a unit that Battle Hardens is automatically rallied, even if the DRM would otherwise make that impossible. So under the right conditions (e.g., a broken conscript HS under DM being rallied by a +1 leader) a Rally DR of "2" will not in itself automatically rally the unit. What it does do, however, is guarantee a DR on the HOB table (which has its own set of applicable DRM). As JR intimates above, given that the unit is broken, the +1 DRM for that (regardless of anything else) tends to shift the probability of the result beyond that required to generate a hero. Still, if you roll low enough on the HOB table, you might still generate a hero and nothing else -- but (paradoxically) it's the elite, high-quality guys who will get that result most frequently! Sometimes it's better to be scum ... as long as you're not too scummy.