Short answers, pulled from the story.
German troops entered Paris at 5:30 in the morning on the 14th of June 1940, after the French government had declared it an open city two days earlier. The occupation lasted until the city's liberation on the 25th of August 1944.
General Leclerc's French 2nd Armored Division, supported by the American 4th Infantry Division, entered Paris on the 25th of August 1944 alongside the local Resistance uprising. German commander Dietrich von Choltitz surrendered to Leclerc that afternoon at the Montparnasse train station.
The French government declared Paris an open city on the 12th of June 1940 to spare it from street fighting. Marshal Philippe Pétain rejected British calls to defend the capital, saying, "To make Paris into a city of ruins will not affect the issue."
Jews in Paris were forced to wear the yellow Star of David from the 29th of May 1942 and were barred from many professions and public places. On the 16th and the 17th of July 1942, French police rounded up 13,152 Jews, including 4,115 children, and by the liberation about 43,000 Paris-region Jews had been deported and roughly 34,000 murdered.
Parisians lived under a nightly curfew and strict rationing of food, coal, tobacco and clothing that grew worse each year. The number of cars on Paris streets fell from 350,000 before the war to under 4,500, and a thriving black market sprang up to supply what rationing could not.
In the Seine department, 9,969 people were arrested for collaboration, of whom 8,335 were found guilty and 598 were sentenced to death, though only 116 were actually executed. Women accused of relationships with German soldiers had their heads shaved in public as a separate, informal punishment.