Russia's top diplomat argued that U.S. military presence in Syria was illegal and rebutted accusations over the poisoning of an ex-Soviet spy.
Turkey and its insurgent allies are sweeping through Kurdish territory and risking an international conflict with the U.S., France, Syria and Iraq.
The U.S. and Russia have both contributed to the fight against ISIS, but their goals for postwar Syria differ.
A top Russian general reportedly intervened to stop an attack from the U.S., preventing a repeat from last month in which many Russians were killed.
Iraq and Syria declared victory over ISIS in late 2017, but the U.S. and Turkey have resisted calls to withdraw their forces.
Experts say John Bolton’s appointment as national security adviser could lead to the next major U.S. war 15 years after he supported the invasion of Iraq.
As the number of ISIS targets diminish and new fronts open, Syrian airspace is becoming smaller and more confusing.
The U.S. military would need to evacuate more than 200,000 U.S. citizens and others in the event of a war breaking out with North Korea.
The Pentagon needs 80 new plutonium cores per year by 2030 to sustain existing nuclear weapons.
Russia's top general discussed leading issues with his U.S. counterpart and the NATO commander as Trump defended Putin on Twitter.
After defeating ISIS, Iraq and Syria have called for a complete withdrawal of Turkish forces battling Kurds in both countries.
Japan’s claims to islands seized by Soviet forces in World War II and installation of U.S. missile defense have troubled relations with Russia.
Gaps in the U.S. chain of command may have doomed four Green Berets of Operational Detachment-Alpha Team 3212.
Neither Russian President Vladimir Putin nor Chinese President Xi Jinping expected much opposition this weekend, but their victories resound worldwide.
Over 10,000 Chinese marines traveled across the country for battle exercises as they prepared for threats at home and abroad.
He said the subs got close to an American military base but nobody knew they were there.
Russian Foreign Minister Sergey Lavrov warned that Moscow "made it clear" the U.S. would not be allowed to attack the Syrian military.
Details remained unclear about the incident; an investigation will be launched.
Russia said the U.S. may risk "opening a Pandora's box" if it takes their military rivalry to outer space.
The Marines want the new drone to be fully operational by 2034.
"My new national strategy for space recognizes that space is a war-fighting domain, just like the land, air, and sea."
Less than two weeks after Russian President Vladimir Putin showed off advanced weapons, his officials are warning the U.S. against action in Syria.
Despite top U.S. defense officials urging Trump to stay in the Iran deal, Secretary of State Rex Tillerson was fired over his support for the agreement.
With fewer local allies, the U.S. may no longer be able to fight ISIS on the ground in Iraq or Syria.
When it comes to guns, the U.S. is always number one.
Once found only in works of fiction, Russia's deputy defense minister said such devices were now a very real and necessary tool of modern warfare.
Events that will have more of the Air Force flyovers this year include NFL, MLB and college sports games.