The annual Victory Day parade showcases Russia's future military acquisitions.
The longest-serving commander in the longest war in U.S. history said he would welcome Moscow's help.
Engine trouble is currently believed to have caused the deadly crash at sea.
China confirmed it would be hosting another series of joint exercises with Russia as the two lead U.S. military rivals boost their Pacific cooperation.
Russia's submersible drone, known to Russia as Poseidon and to the U.S. as Kanyon, may change nuclear warfare as we know it.
Moscow has repeatedly hinted it could send some of its most advanced air defense systems to Syria.
Top U.S. military rivals Russia and China have pledged to deepen military ties and create a united front against the U.S. in its Syria and Iran policies.
U.N. Secretary-General António Guterres said the mechanisms that prevented the last Cold War from escalating no longer exist. That spells trouble.
The world's top two military powers may be on a collision course in Syria.
"We hope the Trump administration thinks twice before deciding to attack Syria," the ruling Chinese Communist Party's newspaper said.
Defense Secretary James Mattis is heading to the White House to show President Donald Trump his options for attacking Syria.
Russia has bolstered its air defenses in Syria, but shooting down a U.S. cruise missile is a sophisticated task that will put Putin's military to the test.
Russian jets are soaring over the waters of the Mediterranean, and Syria has moved new air defenses near Assad's presidential palace.
President Trump could decide whether to attack Syria as soon as "later today," a move that could draw a Russian military response.
Despite peace talks on the Korean Peninsula, Russia says the U.S. is risking a war with military exercises and "maximum pressure" against Kim Jong Un.
China's new defense chief chose Russia for his first visit and pledged support at a time when Moscow's relationship with the West has deteriorated.
The anti-satellite weapons are part of massive pushes to upgrade and update their militaries.
The RS-28 Sarmat could be seen taking flight as both the Russian and U.S. leaders discussed an "arms race."
The U.S. and Russia have both contributed to the fight against ISIS, but their goals for postwar Syria differ.
Vladimir Putin said the RS-28 Sarmat has no range limits and "is untroubled by even the most advanced missile defense systems."
Russia's defense minister gave a detailed review of his country's military upgrade in the Arctic.
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.
Both Russia and Japan claim the so-called Kuril Islands, in a dispute stretching back to World War Two.
The tests come as Russian President Vladimir Putin revealed new nuclear missiles and Moscow's relationship with the West took another major blow.
Russia has chosen the names of three advanced weapons recently revealed by Putin, but what do they mean?
Russia's top general discussed leading issues with his U.S. counterpart and the NATO commander as Trump defended Putin on Twitter.
Neither Russian President Vladimir Putin nor Chinese President Xi Jinping expected much opposition this weekend, but their victories resound worldwide.