The Pentagon has begun a broad review of U.S. defense strategy as officials assess shifting security risks tied to China and Russia. Senior defense officials said the effort is designed to align military planning with a more volatile global landscape.

The review will examine how the U.S. should prepare for emerging threats, including advances in military technology, regional flashpoints, and the pace of great-power competition. Officials did not provide a detailed timeline, but described the process as a comprehensive update to current strategic assumptions.

The move comes as Washington faces pressure to balance support for allies, deterrence planning, and domestic defense priorities. Analysts say the review could influence spending decisions, force posture, and the way the Pentagon allocates resources over the coming years.

While the review is still in its early stages, it signals that U.S. defense leaders expect long-term strategic competition with both China and Russia to remain central to military planning.