What is an Act of War?

In light of the beginning of Attacks against Libya and the UN Security Council Resolution authorizing the establishment of a No-Fly Zone over part of Libya I thought it would be useful to have a post about Acts of War and historically what has been considered a legitimate reason to go to war. I will focus this post on the Westphalian System established in 1648 by the Peace of Westphalia ending the Thirty-Years War that also inaugurated the current system of Sovereign nation-states operative in the world today. The Westphalian System did not spring fully formed in 1648, mainly because it was focused on monarchical and dynastic states and not … More after the Jump…