Both sides were compositionally identical: 24 infantry, a cannon with 4 crew, 6 cavalry, and 2 officers.
The Charge!rules are wonderfully simple: the entire 'elementary' game rules are summarized on two pages! They are also good simulation rules, both in terms of the effect of musketry and the back and forth of cavalry melee. Both sides began trundling forward. Army Red's (me) artillery fire was spot on and Army Black took dreadful casualties as they advanced.
No pictures but there was a swirling melee to the left between the cavalry.
Including set up time, I think we played this whole game in 45 minutes or so. The figures are a mix of HaT infantry, Timpo cavalrymen on Imex horses, Armies in Plastic cannons, Call to Arms crew with All the Kings Men heads swapped on, and Italeri command figures (phew!).