https://en.m.wikipedia.org/wiki/Russia–NATO_relations#Founding_Act

In 1999, Russia condemned the NATO bombing of Yugoslavia,[54][55] which was done without a prior authorization by the United Nations Security Council, required by the international law.[56] For many in Moscow, a combination of NATO’s incorporation of Eastern Europe and its military attack on sovereign Yugoslavia exposed American promises of Russia’s inclusion into a new European security architecture as a deceit. Yeltsin’s critics said: ‘Belgrade today, Moscow tomorrow!’ [23]

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A drastic reversal in the US and NATO policy toward Russia occurred in December 2001. Most importantly, the US unilaterally withdrew from the Anti-Ballistic Missile Treaty with Russia in 2001–2002, which was followed by the US signing bilateral agreements with Poland and Romania (with NATO support) to build ballistic missile defense (BMD) systems in their territories, against Russian wishes. Although none of these events depended on NATO enlargement - not even the agreement to build BMD sites in Romania and Poland, given that the United States also has bilateral BMD equipment arrangements with a wide variety of non-NATO members (including Bahrain, Egypt, Israel, Japan, Kuwait, Saudi Arabia, South Korea, Taiwan, and the United Arab Emirates) - this withdrawal was interpreted by the Russian political elite, and by many Western political scientists, as US exploitation of political and military weakness in Russia at the time, and led to the loss of Russia’s trust in America’s political intentions.[23]

The US also called article 5 after 9/11 and the Afghanistan invasion was a “NATO and friends” mission. Also the Iraq invasion was done by various NATO members, even if it wasnt formally a NATO mission. However even countries not involved in the fightinf were provising logistics such as Germany.