Expression of agreement under international laws is considered as international treaty, which is governed by the same rules. Treaties are like contracts wherein both parties agree to take up obligations amid themselves. Any party failing to live up to the obligations is liable to be tried under international laws. There have been numerous international treaties comprising of peace agreements, contracts between states, tribal groups and governments etc. one thing all of them have in common today is that all of them have become historic in some way or the other. We have listed below the ten most historic international treaties by our account.