In the Jena-Auerstedt Campaign of 1806, Marshal Bernadotte fought in a manner which certainly gives the impression that he was hoping his fellow Napoleonic marshals would be defeated. Although in earshot of the fighting at both Jena and Auerstedt, he refused to move his corps. Napoleon considered removing him from command on the spot, and was probably only deterred by the fact that he was married to Napoleon's former flame, Desiree Clary.
What if Napoleon had not weighed emotional matters so strongly and had gone ahead and removed Bernadotte, sending him home in disgrace? Considering the remarkable career Bernadotte went on to achieve, such a measure would have significant impact.