Who does napoleon marry on april 2, 1810? why did napoleon choose this particular girl?

Marie Louise Napoleon became a general at a very young age and was put in a position of authority where the generals and almost all other officers he commanded were older than him. He felt that this wasn't a satisfactory situation and concluded that if he married a woman older than himself, he might claim to be older than he actually was and thereby obtain a little more respect from his officers. He also wanted to marry a rich, older woman.