iago, preteneding to be othellos faithful supporter, warns othello that barbantion will attempt to breack up the marrige. othello is confident that his service to venice and his noble descent will amke all well. cassio arrives on an urgent mission from the duke to find othello he reports that war is imminent and the senate urgently needs othello. iago tells cassio of othello's marriage. barbantio abuses othello and physically threatens him. he accuses othello of enchanting desdemona with bad magic and drugs, and orders his arrest. othello reacts calmly. barbantio is certain that the duke will decide in his favour. and thats the end of scenne 2. so the thing that just happened is barbatio is now coming after othello to take his daughter back. and othello is then asked for his help in some kind of war.