Coordination requires communication. Instant communication was only possible within drum, trumpet, or semaphore range: a couple miles at best. Long distance communication was only possible by messenger.
Small units cannot be effectively coordinated against a massed enemy when your best communication method is some dude with a horn. Until the telegraph and telephone allow for trench warfare, Napoleonic big-unit tactics are the best we can expect.
Coordination requires communication. Instant communication was only possible within drum, trumpet, or semaphore range: a couple miles at best. Long distance communication was only possible by messenger.
Small units cannot be effectively coordinated against a massed enemy when your best communication method is some dude with a horn. Until the telegraph and telephone allow for trench warfare, Napoleonic big-unit tactics are the best we can expect.