France and the U.K. signed a “Declaration of Intent” on Tuesday to send their forces to Ukraine in the event of a peace deal with Russia.

President Volodymyr Zelenskyy on Friday appointed the head of Ukraine's military intelligence as his new chief of staff, a move that comes as the U.S. leads a diplomatic push to end Russia's nearly 4-year-old invasion.

In a dimly-lit wooden bunker, a tall, formidably-built Ukrainian officer is filmed from behind, wishing his men good fortune one by one with firm handshakes before a mission. The soldiers in question — a few dozen mobilized Ukrainian men mostly in their forties,

President Donald Trump’s administration will agree to support Ukraine in the event of a future Russian attack, according to a draft statement being negotiated by Kyiv’s top allies.

Europe needs a strong bulwark against Russian aggression, but building and maintaining it will be challenging.

As Russia’s invasion of Ukraine approaches its fifth year, the character of the war continues to evolve into a technical struggle shaped by drones, electronic warfare, and the ability to strike at depth.

Coalition of the Willing signs Ukraine security agreement with U.S. support, establishing multinational force and ceasefire monitoring mechanism.

President Volodymyr Zelensky said Ukraine needs to focus on security issues, developing its defense and security forces, and peace talks.

First, we need to spread a start-up culture throughout the government and civilian economy. In wartime, it has been military units like Khartiia and the 3rd Assault Brigade that have transformed the methods and morale of the Ukrainian military and made it a world leader in technological innovation and tactical agility.