What was the main mistake that Napoleon made at the battle of Waterloo?

Answer 1

There was not really one.

Lack of knowledge of the terrain, he was not aware there was a large ridge concealing and protecting the majority of English troops from the French artillery.

Poor intelligence, he did not know a second force was moving up his flank.

A large stone farm house was turned in to a strong point for the British forces and tied up a large part of the French advance.

The cavalry was wasted attacking strong infantry positions.

and His ego prevented him from changing his plans and fighting the battle on his terms not Wellington's.

But if you had to pick I would say his letting his ego override his common sense.

Answer 2

He didn't personally view the battleground beforehand. If he had, he would have known it was bad terrain and that the English were there.

Answer 3

Didn't count on it raining. Tough to march and move artillery through the mud, especially when they are sneaking up on your unguarded ****.

Answer 4

He used his previous techniques, which the enemy’s already knew. In addition, he would not listen to his generals.

Answer 5

He was outnumbered