What is the exposition and the inciting incident in the first act of the movie Casablanca?

In the exposition of "Casablanca," we are introduced to the war-torn backdrop of World War II, the city of Casablanca, and the key characters, including Rick Blaine, the cynical American bar owner, and Ilsa Lund, his former lover. The inciting incident occurs when Ilsa and her husband, Victor Laszlo, arrive at Rick's Café seeking letters of transit to escape to safety. This reintroduction of Ilsa into Rick's life ignites unresolved feelings and sets the stage for the central conflict of the film.