As the United States faces possible retaliatory attacks from Iran, a “brain drain” in top Justice Department and FBI national ...

P resident Donald Trump said he has his eyes on the 50,000 Russian troops deployed to the border near Sumy in Ukraine, where there are fears Moscow is ready to launch a new summer offensive in a war ...

Ukraine's industry is growing rapidly amid Russia's invasion, and Ukraine is relying less on allies. But the industry says it has far more capacity that's unused as Ukraine can't spend that much.

Ukraine said it hit 41 Russian planes in a huge attack and identified the aircraft as key to Russia's missile attacks and intelligence gathering.

Welcome to The Hill’s Defense & NatSec newsletter{beacon} Defense &National Security Defense &National Security The Big Story Ukraine plays surprise card in Trump’… ...

If you believe Russia’s apologists, then Ukraine, hot off bold strikes on military airfields spanning Russia and the Kerch Strait Bridge in Crimea, is recklessly risking giving Russian President ...

Ukraine’s asymmetric drone attack caught the world’s attention and dealt a significant blow to Russia’s defense. Peace prospects may hinge on how Vladimir Putin and Donald Trump respond.

By now Americans know about Ukraine’s remarkable drone strike on Sunday that damaged as many as 40 aircraft deep inside Russia as strategic bombers sat like ducks in a row on military bases. One ...

The Senate’s New Ukraine Bill Will Not Work—But Here Is How to Fix It The Sanctioning Russia Act would impose history’s highest tariffs and tank the global economy.

At least five people, including a 1-year-old, were killed in a Russian attack on Ukraine just hours after a phone call between President Donald Trump and Russian President Vladimir Putin.

Ukraine isn’t just surviving, it’s writing the playbook for 21st-century warfare. If the United States wants to stay ahead of its adversaries, it must stop watching from the sidelines and ...