Operation Atlantic Resolve

U.S. Intensifies Diplomatic Efforts, but No Agreement Reached

• President Trump and other senior officials held several high-level engagements with Russian and Ukrainian counterparts.
• The purpose of the high-level talks was to secure a durable and sustainable peace agreement.
• Ukraine and Russia did not agree to a ceasefire or peace deal.

U.S. Presses NATO Allies to Assume Greater Security Responsibilities

• The 2025 National Security Strategy shifted U.S. security priorities to the Western Hemisphere.
• The Trump Administration pressed NATO allies to increase defense spending and take the lead role in defending Europe from Russian aggression
• The U.S. and NATO established a new system through which allies fund the purchase of U.S. weapons and materiel for Ukraine.

OAR Oversight is Improving Operations

• The Military Services reevaluate certain contracts to ensure that the costs associated with Ukraine assistance were reasonable.
• The Army and Air Force improve processes for providing supplies through the Ukraine Security Assistance Initiative.
• State build on USAID’s oversight of Direct Budget Assistance to Ukraine.
• U.S. Government agencies define objectives with targets for sanctions and export controls on Russia.

The UAF Slows but Does Not Stop Russian Advances

• Russian forces took 1% (1,865 sq. mi.) of Ukrainian territory in 2025, which included no operationally significant cities.
• Russian forces continued to enjoy advantages in numbers and equipment over the Ukrainians.
• Russia held roughly 20% of Ukraine’s territory at the end of 2025, an approximate 3% gain since December 2024.

Russia Increases its Long-Range UAV and Missile Strikes on Ukraine

• These attacks targeted population centers and critical infrastructure, especially around Kyiv.
• The rate of these strikes increased by 44.5% over the previous 6-month period.
• The UAF intercepted most of these strikes, but the increased volume stressed Ukrainian air defense and increased reliance on foreign donations.

Russia Increases Hybrid Warfare in Europe and Violations of NATO Airspace

• There were at least 6 incidents of Russian large unmanned and manned aircraft violating NATO airspace.
• In many of these events, NATO allies scrambled fighter jets to respond.
• There were also several incidents of small UAVs of unknown origins flying over airports, military bases, and other sensitive areas in Europe.
• U.S. forces in Europe deployed a new system to counter small UAVs, which uses cost-effective interceptor UAVs.
• There were also incidents of alleged Russian sabotage, espionage, election interference, and cyber operations against NATO members.

Additional Information

Agency Contact

For more information, visit the following agency websites related to Ukraine:

• Department of Defense OIG
• Department of State OIG 
• U.S. Agency for International Development OIG