Neither side had any real idea of why it was at war, and didn’t really want to continue. It took a number of summary court martials and executions to get the war rolling again.
In WWII, ideology had replaced religion in both sides, and that type of thing was no long possible.
I think that I read about his truce in Carnage and Culture, by Victor Davis Hanson. I think that I also read in C&C that in very early warfare the soldiers could get together and depose a general, if he was not doing his job. When I read of this, all I could think of was Robert MacNamara. I don't know how any person could have the heart to write the book he wrote, so many years and so, so many deaths after the fact. To pierce the hearts of those family members who were left behind.
If it would have been up to me, I would have given him 30 days worth of food, a good knife and I would have exiled him to Borneo or some other country where they're reputed to still have head-hunters.