Lacking battlefield successes, Moscow is hitting Ukraine’s energy facilities to force territorial concessions.

The Pentagon has released a National Defense Strategy that chastises U.S. allies to take control of their own security and ...

Russia’s Su-34 was built to dominate Ukraine’s skies, but unexpected Ukrainian tactics and Russia’s own missteps turned it ...

The Ukrainian leader says the document now needs to be signed by "presidents", without giving details of its content.