NATO this week agreed to the biggest upgrade of its military presence in Europe since the end of the Cold War, redrawing the continent’s security in response to Russia’s invasion of Ukraine.

At a summit in Madrid, NATO leaders agreed to put more than 300,000 troops on high alert while strengthening its European defenses with extra forces, enhanced air power and new equipment, including two additional squadrons of U.S. F-35 stealth fighters.

After Turkey dropped its veto on Sweden and Finland’s membership applications, the alliance is also set to add two new members, bolstering the exposed Baltic nations.