President Donald Trump introduced a significant shift in focus at a NATO summit in Turkey, launching a series of strikes on Iran and revoking a license that permitted Tehran to sell oil on the global market. These actions occurred late Tuesday, altering the intended agenda of the gathering, which was primarily set to address defense spending commitments and support for Ukraine.

The strikes were ordered in retaliation for attacks on three merchant ships in the Strait of Hormuz, highlighting the precariousness of an existing interim agreement to cease hostilities between the U.S. and Iran. Trump initiated the military action shortly after a dinner with Turkish President Recep Tayyip Erdogan, where leaders from NATO's 32 member nations convened ahead of scheduled discussions on progress toward alliance defense spending targets.

This marks a rare instance of a U.S. president authorizing military action while abroad, drawing a parallel to former President Barack Obama's authorization of strikes in Libya in 2011 during a trip to Brazil.

Trump had previously expressed frustration with allies' reluctance to grant access to bases for U.S. forces targeting Iran, demanding "loyalty" and characterizing NATO as a "paper tiger." During a meeting with President Erdogan, Trump stated he was testing NATO allies' commitment, noting that Italy, Germany, and France had denied requests for base access. "Why are we spending hundreds of billions of dollars and they’re not there for us?" Trump asked.

NATO summits typically aim to project unity and deter potential adversaries, a message deemed crucial amid Russia's ongoing war in Ukraine and concerns about broader European security. NATO Secretary-General Mark Rutte had previously acknowledged the "Trump Trillion," referring to the $1.2 trillion in increased defense spending by European allies and Canada since 2017, much of which is slated for U.S. companies.

Despite hopes that Trump might acknowledge these increased commitments, his remarks indicated continued criticism. On the eve of the summit, Trump reignited a dispute over Greenland, asserting U.S. control over the Danish territory, a stance that contradicts NATO's principle of mutual territorial defense.

Trump has consistently argued that the U.S. bears an disproportionate share of NATO's defense burden. At the previous year's summit, allies agreed to invest 5% of their GDP in defense, with 3.5% for military budgets and 1.5% for infrastructure supporting troop and equipment movement.

Rutte had urged members to present "clear, concrete and credible plans" to meet the alliance's defense spending goals. New NATO figures released Tuesday indicated that Slovenia, Belgium, Spain, and the Czech Republic were among nations struggling to meet the established 2% of GDP defense investment target.

The U.S. administration has outlined a vision for a more agile "NATO 3.0," where Europe takes greater responsibility for its own security, including providing conventional weapons to Ukraine, while the U.S. maintains its nuclear umbrella. European allies and Canada are seeking clarification on potential reductions in U.S. military presence in Europe, pending a six-month Pentagon review.

Ukrainian President Volodymyr Zelenskyy appealed for Ukraine's membership in the alliance, citing the combat experience of Ukrainian forces as a significant enhancement to NATO's defense capabilities. Zelenskyy, who was scheduled to meet with Trump, emphasized Ukraine's capacity to strike deep into Russia and neutralize Russian troops, reporting an average of 30,000 Russian troops eliminated monthly.

Concerns persist among some European nations regarding potential hybrid attacks from Russia, particularly as Russian President Vladimir Putin faces challenges in Ukraine. Trump is also scheduled to meet with Syrian President Ahmad al-Sharaa, a figure who has garnered Trump's support for rebuilding Syria despite past affiliations.