On 21 May he destroyed his siege train and retreated back to Egypt , having lost 2,200 men dead , 1,000 of them to the plague .
The French attacked multiple times between 19 March and 10 May before Napoleon finally gave up .
On 21 May Napoleon destroyed Napoleon 's siege train and retreated back to Egypt , having lost 2,200 men dead , 1,000 of them to the plague .
The French attacked multiple times between 19 March and 10 May before Napoleon finally gave up .