How the theme of honour demonstarted in Julius Caesar?

Brutus is deffinatley the best example. He was willing to sacrifice everything for the good of Rome. He ultimately lost his wife because of it all things considered. I'd say you are on the right track. He before in the play talked about how he didn't believe in suicide but then changed his mind saying he didn't want to be a prisoner used as an example, instead he'd keep his honor intact. He based killing Caesar off of good intentions and idealism for Rome to be the best. You are on the right track! Keep going!