Quote Originally Posted by Quin
This is somehow stupid. Cavalry never galloped 200 meters, then stopped, reformed and charged from 30 meters! They needed those 200 meters to gain momentum and speed,
Methinks you've seen too much Hollywood. Here's a quote from a soldier who actually led cavalry charges:

No distance can be laid down at which to charge, it depends on so many different circumstances. When the ground is favourable and your horses in good condition you can strike into a gallop sooner; but the burst, the charge itself, must always be reserved till within 50 yards, for in that distance no horse, however bad, can be left behind, nor is there time to scatter, and they fall on the enemy with the greatest effect.
British cavalry office, 1853