As an officer in the French Army he was currently taking "leave". He didn't go to the Vendee when ordered and pretty much ignored the Directory during the Italian Campaign.
He was ordered to command the Army to invade England but instead went to Egypt (although he got the Directory to acquiesce in this) , which Army he then abandoned.
He then did a Coup against his Government, pretty much the ultimate in disobeying orders wouldn't you say ?

Ah, but if you believe that you are A Man Of Destiny.you're allowed to ignore the rules that apply to ordinary mortals.