Hi,
Since this discussion started I have been looking at Combined attacks and I think they were a major common tactic along with, cav vs cav, threatening flanks. Cav vs Infantry and scounting.
http://en.wikipedia.org/wiki/Battle_of_Waterloo
""Many popular histories suggest that the British heavy cavalry were destroyed as a viable force following their first, epic charge. Examination of eyewitness accounts reveal, however, that far from being ineffective, they continued to provide very valuable services. They counter-charged French cavalry numerous times (both brigades),[86] ****halted a combined cavalry and infantry attack****** (Household Brigade only),[87][88] were used to bolster the morale of those units in their vicinity at times of crisis, and filled gaps in the Anglo-Allied line caused by high casualties in infantry formations (both brigades).[89] This service was rendered at a very high cost, as close combat with French cavalry, carbine fire, infantry musketry and – more deadly than all of these – artillery fire steadily eroded the number of effectives[90] in the two brigades. At the end of the fighting the two brigades, by this time combined, could muster only a few composite squadrons""
""Eventually it became obvious, even to Ney, that cavalry alone were achieving little. Belatedly, *****he organised a combined-arms attack,******* using Bachelu's division and Tissot's regiment of Foy's division from Reille's II Corps (about 6,500 infantrymen) plus those French cavalry that remained in a fit state to fight. This assault was directed along much the same route as the previous heavy cavalry attacks.[103] It was halted by a charge of the Household Brigade cavalry led by Uxbridge. The British cavalry were unable, however, to break the French infantry, and fell back with losses from musketry fire.""
If you go to the site there a numbers and links to the references
Also Ive got a good site with peninsular battle maps with arrows of the units. And I would say in half of the battles the french did a combined attack.
So I feel it is realistic to have it as common place.
It may be easier to do one on a wargames table but so are all the other manauvers and the timing of attacks as I've touched on.
Cheers