At the last Tring Wargames Club games day, we played a Franco-Prussian War battle using the Fire and Furia Francese amendments for Fire and Fury (produced by the Wyre Forest Wargamers).
It pitted 3 Prussian Corps against the equivalent of two French ones. The Prussian objectives were to maintain control of the bridges across the river and seize the road junction at the French table edge. The French had a choice either to Attack, in which case the objectives were the bridges, or to Defend, where the objective was to hold the road exit. If the chose the latter then and units from the off-table reserve that was destroyed, would count against their victory point total. After a brief debate, the French commanders decided to defend.