The Whole World In Your Hands

You send in all available men to sack the capital. They are deployed from ships onto the Isles and make quick work of the Brits. But of course, most of your men were drafted, and so they had poor training. Many of your men were killed in battle.

All remaining nations join forces to defeat you, incuding 2 billion from India and China. You have no chance, and so all plans to conquer the world are lost.

You are exiled to an island called Elba. Unsatisfied with your current position, you gather troops and conquer much of France. You are defeated at a city known as Waterloo and are re-exiled to another island, St. Helens. There you die.

If you had no idea what the previous paragraph was about, I suggest learning something about Napoleon. Maybe that's why you didn't have the necessary knowledge to conquer the world.
End Of Story