Since we're all here we might as well learn something:
Peace of Westphalia - 1648
www.historytoday.com
The Westphalia area of north-western Germany gave its name to the treaty that ended the Thirty Years' War, one of the most destructive conflicts in the history of Europe.
The war or series of connected wars began in 1618, when the Austrian Habsburgs tried to impose Roman Catholicism on their Protestant subjects in Bohemia. It pitted Protestant against Catholic, the Holy Roman Empire against France, the German princes and princelings against the emperor and each other, and France against the Habsburgs of Spain. The Swedes, the Danes, the Poles, the Russians, the Dutch and the Swiss were all dragged in or dived in. Commercial interests and rivalries played a part, as did religion and power politics.
Westphalian Sovereignty
en.wikipedia.org
Westphalian sovereignty, or state sovereignty, is a principle in international law that each state has exclusive sovereignty over its territory. The principle underlies the modern international system of sovereign states and is enshrined in the United Nations Charter, which states that "nothing ... shall authorize the United Nations to intervene in matters which are essentially within the domestic jurisdiction of any state." According to the idea, every state, no matter how large or small, has an equal right to sovereignty. Political scientists have traced the concept to the Peace of Westphalia (1648), which ended the Thirty Years' War. The principle of non-interference was further developed in the 18th century. The Westphalian system reached its peak in the 19th and 20th centuries, but it has faced recent challenges from advocates of humanitarian intervention.
The
Congress of Vienna (1815) may be more appropriate - create peace in Europe to "balance" Big Powers (Power 5 to Power 4??) after Napoleon rampaged around Europe (SEC??) trying to conquer or create client states - compared to Westphalian non-interference/Sovereignty, but doesn't have as good of "Alliance" pictures
en.wikipedia.org