What do you think Greene meant when he said the “success of the day seemed to be doubtful for a
long time”?

Revolutionary war, quote from patriot general Nathanael Greene. Could not find exact battle but what he meant; fog of the battle, seesaw of British then Continental forces having the upper hand...it was only later in the day long battle he was assured driving off British forces.

The answer is william henry harrison pursued and defeated british forces retreating into canada.