Mersen, Treaty. 870. Divided Lotharingia. Charles II and Louis the German establish French/German frontier.

Methuen Treaty. 1703-1836. Reduced duty on port wine to England, textiles to Portugal. Hindered Portuguese industrial development.

Mexican War. 1846-8. US acquires western territory (5 states). Guadalupe-Hidalgo. 1861-4. Napoleon III conquers Mexico, installs Emperor Maximilian.

Moscow Treaty. 1920 Baltic Liberation. 1921 Turkish frontiers. 1970 W Germany, USSR renounce force.

Napoleonic Wars. 1803-15. France conquers most of Europe until Waterloo. Paris Treaty. Wars of Coalition.

NATO. North Atlantic Treaty Organization. 1949- Collective defence alliance of Western European and North Atlantic countries to preserve democratic freedom. UK, Canada, France, Belgium, Netherlands, Luxembourg, Norway, Denmark, Iceland, Italy, Portugal, US. 1952 Greece, Turkey, 1955 FRG. 1964 -Greece. 1966 -France. 1980 +Greece. 1982 +Spain. 1993 +France. 1999 +Poland, Hungary, Czech Republic. 2004 +Latvia, Estonia, Lithuania, Bulgaria, Romania, Slovakia, Slovenia.

Nerchinsk, Treaty. 1689. Russia-China trade agreement. China recognizes Russia.

Neuilly, Treaty. 1919. Bulgaria and Allies. Bulgaria cedes land and pays WWI reparations, loses outlet to Mediterranean.

Nikolsburg, Treaty. 1621. Austria regained Hungarian crown, Transylvania enlarged.

Noyon, Treaty. 1516. France cedes Naples to Spain.

Nuclear Nonproliferation Treaty. 1968. USSR, US, UK, +59 others. Effective 1970.

Nystad, Treaty. 1721. Russia/Sweden. Russia gains window on Baltic. Ends Great Northern War.

O’Connor, Rory. c1116-98. Last high king of Ireland 1166-75. Submitted to Henry II in Treaty of Windsor.

Offa. 755-796. King of Mercia 757-. Founded St. Alban’s abbey. Dee Dyke vs Welsh 785. Introduced coinage. Treaty with Charlemagne. Began unification of England.

Oldenbarneveldt, Jan van. 1547-1619. Dutch statesman vs Spanish occupation. Negotiated Treaty of Utrecht.

Olmütz, Treaty. 1850. Restored German Confederation under Austria.

Opium Wars. 1839-42 Hong Kong ceded to Britain. 1856-60. French, British force China to open trade, legalize opium. Demonstrated European weapon superiority. Nanking Treaty.

Oregon Question. 1818-46. Britain vs US on Canadian border. Treaty established 49°N 1846.

Orlando, Vittorio. 1860-1952. Italian Prime Minister 1917-19. Versailles negotiator.

Paix des Dames. Cambrai Treaty. 1529. Francis I’s mother and Charles V’s aunt negotiate halt to Italian Wars.

Pangkor Engagement. 1874. Treaty with Perak established British rule in Malaya.

Paris Peace Conference. 1919-20. Versailles Treaty.

Passarowitz, Treaty. 1718. Venice cedes Peloponnesus to Ottomans. Ends Turkish War.

Pavia, Battle. 1525. Holy Roman Empire defeats France. Madrid Treaty.

Pedro II. 1648-1706. King of Portugal 1683-. Treaty of Lisbon.

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