I'm playing the "Whites of Their Eyes" campaign, v 1.06
About 10 militias disbanded simultaneously in the winter of 1776 (at the end of the turn) after I got the message that Montreal (i believe that was the Canadian City) was not captured.
Is this WAD? The were all in structures and spread through the country; many were in armies that did not lose any other units. Supply was okay, etc.
I believe that prior to this the British gave amnesty to "all" Yankee troops.