The Contested Commons By Michèle Flournoy and Shawn Brimley - The Under Secretary of Defense for Policy and an OSD strategist are focusing on the sea, the air, space, and cyberspace. 

Adapting the Force to the Fight: Naval Special Warfare By Captain John J. Burnham, USN - Attention to irregular warfare operations, which currently lie at the heart of Naval Special Warfare, is unlikely to shift soon.