"The actions of the U.S. coalition do not comply with legal norms. Beyond all doubt, it is an unprecedented act of aggression," one Russian senator said.
Then why did Trump launch a missile strike against the Shayrat airbase in Syria?
An account affiliated with Turkey's so-called Operation Olive Branch claimed Kurdish fighters attacked the Free Syrian Army with chlorine gas.
As a Turkey-backed offensive neared Manbij, Syria, the head of U.S. Central Command said withdrawal was "not something we are looking into."
Russia is reinforcing its forces in Crimea by dispatching more S-400 surface to air missiles there.
After ISIS was mostly defeated in the east, the Syrian military set its sights on rebel-held Idlib, while Turkey targeted U.S.-backed Kurds in Afrin, Aleppo.
Turkey and Syrian rebels have launched a joint operation against Syrian Kurdish forces, putting the U.S. and Russia in a difficult position.
China's long-term global economic and security goals fit in line with a victory for Syrian President Bashar al-Assad.
Ukraine's future is no longer a binary struggle between a pro-Western and a pro-Russian future. Now, China's in the mix.
Chinese Army aircraft may approach Taiwan under the guise of commercial airliners.
The US must not allow itself to be blackmailed by a Kurdish terrorist outfit.
Russia used electronic and conventional warfare to take down a baker's dozen drones.
Ukraine's security service has brought criminal charges against leading reform groups.
Three important things to know about China's burgeoning military policy.
Does Trump have the necessary perseverance and thoroughness to challenge Xi?
Syria and Israel technically remain at war after years of animosity between the neighboring states, which both claim the Golan Heights.
U.S. military forces in Europe are busily repainting their desert tan equipment in forest green.
"On seeing our Western coalition partners in the air, we always tailed them, as pilots say, which means a victory in real combat," a top Russian general said.
The chief of the Russian military's general staff said the U.S. was using its southern Syria base in Al-Tanf as a training ground for militants.
President Donald Trump's foreign policy is creating a path for other countries to exert control over the Middle East, according to analysts.
The deadly shelling was a reminder that the city once called "hell" by the U.N. chief was still threatened by violence a year later.
China may ultimately prefer Ukraine to be in Russia's orbit rather than the West's.
One year after a vicious battle turned the tides of war for Syrian President Bashar al-Assad, he and his Russian ally want the U.S. gone.
Moscow said if U.S. top brass were not deceiving Trump about success in Syria, they should end their operation in the country. But is the Kremlin doing the same thing?