It is true that in Shakesphere's scene, he means to sound like a real dialogue for he wants to show his play to the audiences with a feeling of it being real. This will help his audiences to feel emotions and to capture their hearts and attention in showing the play that he makes. He tries to make real dialogue for the the audiences to enjoy his play and to reach out for them.
I'm not sure about the Great Britain and Us conflict but I do know that the Mexican American war was the war for the possession of Texas? That may be a contrast you may include. I hope this helps.
