News arrives that Napoleon has escaped from Elba, and as a result the stockmarket becomes jittery, causing Amelia's stockbroker father, John Sedley, to become bankrupt. George's rich father forbids George to marry Amelia, who is now poor. Dobbin persuades George to marry Amelia, and George is consequently disinherited. George Osborne, William Dobbin and Rawdon Crawley are deployed to Brussels, accompanied by Amelia and Becky, and Amelia's brother, Jos. George is embarrassed by the vulgarity of Mrs. Major O'Dowd, the wife of the head of the regiment. Already, the newly wedded Osborne is growing tired of Amelia, and he becomes increasingly attracted to Becky, which makes Amelia jealous and unhappy. He is also losing money to Rawdon at cards and billiards. At a ball in Brussels, George gives Becky a note inviting her to run away with him. But then the army have marching orders to the Battle of Waterloo, and George spends a tender night with Amelia and leaves. The noise of battle horrifies Amelia, and she is comforted by the brisk but kind Mrs. O'Dowd. Becky is indifferent and makes plans for whatever the outcome (if Napoleon wins, she would aim to become the mistress of one of his Marshals...). She also makes a profit selling her carriage and horses at inflated prices to Jos, who is seeking to flee Brussels.