The war wasn't well planned or coordinated imho. Part of that i would put down to the large number of people to coordinate.
In the end i think the deciding factor in the war was that first round of fighting. grs got very lucky with the RNG, first against me, then Whomp and Mauer. Our first wave ended up going nowhere which gave grs time to reinforce before we could get a second wave in postion, but then it became a hard slog to get through grs. All this gave Dave plenty of time to prepare himself for when we actually got to him. I really believe had that 1st wave gone as expected we would have cut through grs in half the time and had more troops to throw at dave, which might have given a different outcome