The other very worthwhile time was during the last invasion....first being part of forging an alliance to aid Enweil, then fighting umpteen battles on their behalf....we did kill a load of daimons, nearly managed to save Enweil, at the end had our whole army (no troops left for homedefense, none at all) marching for Enweils capital which was threatened by daimons....did arrive one halfday too late, still decide to attack, did not manage to beat the daimons. If we'd been one halfday earlier we'd have managed, defending their capitals walls jointly with Enweil. That was a huge disappointent....which was capped by Chenier accusing us of doing it on purpose. Go figure.
I don't really remember, but that sounds like something I'd have done. Didn't you guys like lag for one turn before entering the city in order to wait for stragglers? There's always suspicious things going on with everything Rio does. Always.