Transatlantic Security Initiative Commentary & Analysis

Four fundamental questions the NATO Summit did not answer

By Torrey Taussig

Over the coming months, NATO allies will have to wrestle with questions about the US commitment to Europe, their shared approach to China, and more.

Experts react: NATO allies agreed to a 5 percent defense spending target in a low-drama summit. Now what?

By Atlantic Council experts

The Alliance summit was notable for what was said and done, especially about defense spending—but also for what was left off the agenda.

Expect NATO’s new spending pledge to be overshadowed by weakening US commitment and inaction on Ukraine

By Ian Brzezinski, Ryan Arick

The Hague summit will ultimately be defined by what the US president communicates about his commitment to transatlantic security and what NATO allies do to support Ukraine.

NATO Defense Spending Tracker

The Transatlantic Security Initiative’s NATO defense spending tracker delves into data and figures to analyze current defense spending trends.

What counts as ‘defense’ in NATO’s potential 5 percent spending goal?

By John R. Deni, Ryan Arick

The Alliance must ensure that “defense related” items truly contribute to collective defense as it plans its new, larger spending goal.

What explains the transatlantic rift? It’s all about threat perception.

By Jason Davidson

NATO allies’ differing threat perceptions provide the backdrop for what could be a contentious summit in The Hague this month.

The UK Strategic Defence Review lays out an ambitious roadmap for reform. Will the government deliver?

By AM Sir Christopher Harper, KBE, RAF (Ret.)

The review is a positive step toward revitalizing the United Kingdom’s defense posture, but its success will depend on funding and follow-through.

How NATO’s eastern flank is setting the standard for collective defense

By Justina Budginaite-Froehly

NATO’s eastern flank countries have shown that regional coordination can transform vulnerabilities into strategic assets that enhance deterrence and operational readiness.

The case for a Three Seas Defense Innovation Hub

By Justina Budginaite-Froehly

Because of increasing threats to critical energy, transport, and digital infrastructure, the Three Seas Initiative should add defense innovation as another pillar of its mission.