broken enemy unit

Going into CC against a Pillbox. Inside are a GO crew and a broken squad. If they are attacked together is the -2 vs a broken unit DRM applied to the single DR for the whole stack? For example, odds of 1:1 and a DR of 6. Does that kill everyone or kill the broken guy and leave the crew unharmed?

See the attached picture. Assume NO paths exist. May the German squad in M8 rout M9,L9,K10 (2,4,6) and then remain in K10 without being eliminated for FTR? Thanks ahead of time for feedback, JT