International Security & Defense

This piece is a series in the Defense, Emerging Technology, and Strategy (DETS) Program’s analysis on the war in Ukraine, including a corresponding policy brief on Ukraine’s Battlefield Technologies and Lessons for the U.S. published in July 2023. 

The United States tends to react to unexpected events with a combination of fear, political recrimination, and bravado—not a particularly effective mix when it comes to evaluating and responding to potential crises. Despite widespread expressions of concern, some warranted and some hyperbolic, the Chinese surveillance balloon spotted over Montana (and tracked across the country before a fighter jet shot it down over the Atlantic) did not represent a crisis. In fact, it was a gift from Beijing: a necessary wake-up call about the shortcomings in the United States’ national defense. 

The world’s oceans have always provided ships with room to hide. New technology is changing that. Small satellites now collect terabytes of global data daily. Computational analytics can mine that data as humans cannot. Increasingly, this information expands the ability to identify and track ships and their activities, including those affecting national and international security. 

The costly Ground-based Midcourse Defense system remains unproven and unreliable in deterring North Korea’s threat to use intercontinental ballistic missiles. An airborne boost-phase intercept system may offer an alternative defense against North Korea without threatening Russian or Chinese deterrents.

The Russian/Chinese-led bloc is expected to approve Iran's accession this week amid uncertainty over President Raisi's foreign posture and ongoing turmoil in Afghanistan.

The U.S. should accept with humility its inability to fully eliminate terrorism. Specifically, U.S. policy must balance “ends, ways, and means;” establish clear and achievable objectives; adopt efficient, effective, and resource-sustainable strategies; ensure synchronization of diplomatic and military efforts; build alliances to share the burden of countering terrorism; and leverage cooperative mechanisms and regional partnerships to increase the capacity and willingness of regional states to defend their sovereignty and contribute to multinational coalitions against terrorism.  A balanced, integrated, and synchronized strategy encompassing defense, diplomacy, economic, and humanitarian assistance lines of effort should be cornerstone of a revamped foreign policy in the coming decades.

Congress has issued a report on the longest war in U.S. history. Stephen Walt explains why he hopes President Biden ignores it.

Jayita Sarkar explains why the Biden administration needs to re-conceptualize nuclear terrorism and act quickly.

Even as the novel coronavirus pandemic nears its peak, defense analysts are beginning to assess how the global spread of this deadly disease should change how we think about warfare.