Quote Originally Posted by NeonGod
By the end of the war, Douglas Haig, a very influential, Scottish-born general under the UK (who only really came into this position because of connections with the monarchy) learned the lesson and changed his tactics from waiting for his infantry to break through the German line so that his cavalry (yes, cavalry) could charge their way into the heartland of Germany to taking small gains with his infantry and consolidating them, which earned the title "leap-frogging across Europe". Oh, and he is quoted as having said "the machine gun is overrated" - an example of the outdated mindset of the commanders of the era.

I think that about covers the general input...
The British had cavalry waiting behind the lines for this suppossed great breakthrough at the Somme. Although to be fair Russian cavalry (specifically Cossacks) had quite alot of success on the Esatern Front.