The alliance is bolstering its military deterrent in Europe amid Russia’s invasion of Ukraine and has expanded to include Finland.

WRITTEN BY Jonathan Masters, CFR

UPDATED

Last updated April 4, 2023 7:00 am (EST)

Summary

• Established during the Cold War, NATO is a transatlantic security alliance composed of thirty-one member countries, including the United States.
• NATO has focused on deterring Russian aggression in recent years, but it has also conducted security operations in Afghanistan, Iraq, Kosovo, and Somalia. 
• Amid Russia’s invasion of Ukraine, many NATO allies are providing Kyiv with extraordinary quantities of military supplies, and the alliance has expanded to include Finland.

Introduction

Founded in 1949 as a bulwark against Soviet aggression, the North Atlantic Treaty Organization (NATO) remains the pillar of U.S.-Europe military cooperation. An expanding bloc of NATO allies has taken on a broad range of missions since the close of the Cold War, many well beyond the Euro-Atlantic region, in countries such as Afghanistan and Libya.

Russia’s unprovoked invasion of Ukraine, a nonmember, in early 2022 has shaken Europe’s security architecture and prompted a major reevaluation of NATO members’ foreign policies and defense commitments. The threat from Russia has generated the greatest tensions with the alliance in the post-Cold War era. It is driving up defense spending and has pushed some longtime NATO partners, namely Finland and Sweden, to seek full membership. Finland acceded to the alliance in April 2023.

yesterday, April7, 2023 AP

Muslim worshippers perform Friday prayers outside the Dome of Rock Mosque at the Al-Aqsa Mosque compound in the Old City of Jerusalem during the Muslim holy month of Ramadan, Friday, April 7, 2023. (AP Photo/Mahmoud Illean)

JERUSALEM (AP) — It’s become something of a grim, springtime tradition in the Holy Land.

Israeli police fire tear gas and rubber bullets at Palestinians stockpiling rocks and fireworks inside one of the most bitterly disputed holy sites on Earth. The violence ripples across Israel and the occupied West Bank, and militants from as far away as Gaza and Lebanon respond with rockets.

By Jonathan Masters and Will Merrow, CFR

March 30, 2023 1:20 pm (EST)

Russia’s threat to deploy tactical nuclear weapons in Belarus has raised the specter of a new nuclear standoff with the United States and its allies in Europe. It also draws new attention to how such arms are deployed in NATO states.

What’s behind Russian President Vladimir Putin’s decision to deploy tactical nuclear weapons in Belarus?

The move that Putin announced in late March would be the first time since the fall of the Soviet Union that Russia has stationed nuclear weapons beyond its own borders, and it raises the prospects for a renewed, destabilizing nuclear arms rivalry with the United States and its North Atlantic Treaty Organization (NATO) allies.