Short answers, pulled from the story.
Napoleon died on the 5th of May 1821. The two hundred year anniversary of this event saw France deeply divided over his memory with President Emmanuel Macron laying a wreath at the emperor's tomb.
The French army won the victory at the Battle Marengo after crossing the Alps to surprise the Austrian army. Jacques-Louis David painted Napoleon Crossing the Alps to commemorate this daring crossing and winning battle.
After the fall of Napoleon the Napoleonic Code retained by conquered countries including the Netherlands Belgium parts of Italy and Germany served as a basis for certain laws outside Europe. This code also modeled many parts of Latin America and was used in the US state of Louisiana and Canadian province of Quebec.
Napoleon created the Duchy of Warsaw which represented a tangible political achievement for Polish aspirations during an era of foreign domination. He regarded Poles as his most loyal subjects and allies while many Polish generals and legionaires followed him into exile fighting alongside him to restore an independent Poland.
Max Hastings wrote in 2014 that Napoleon had grandiose foreign policy ambitions across Europe and the Americas. He pushed too far until his empire collapsed despite early willingness from Continental powers to accept nearly all his gains by 1808.