The U.S.-led coalition is tasked with battling ISIS, but it has occasionally clashed with pro-Syrian government forces also battling the jihadis.
U.S. allies in Iraq are also supporting the operation.
Buyan-M-class missile corvette Vyshny Volochyok was officially made part of the Black Sea Fleet and is headed off for global military drills.
An Iranian Revolutionary Guards official said his forces were in Iraq and Syria legally, and "if anyone should leave the region, it would be the meddlesome U.S."
A New York Times report revealed the battle between the U.S.-led coalition and pro-Syrian government fighters in dramatic detail.
Iran's Foreign Ministry said "No one can force Iran to do anything" and it would stay in Syria as long as it was welcome.
The group used the messaging app WhatsApp to plan a terrorist attack in Brazil for Carnival.
In his second known trip since 2011, Syrian President Bashar al-Assad told Russian President Vladimir Putin that "stability is improving."
At least 13 people were killed while they were attending Sunday morning services.
Iraqi journalist Muntazer al-Zaidi, famous for throwing shoes at former President George W. Bush, spoke to Newsweek about the "big ideas" he has for his country.
The longest-serving commander in the longest war in U.S. history said he would welcome Moscow's help.
A man believed to have helped oversee the creation of ISIS’s global caliphate says he hasn't seen Abu Bakr al-Baghdadi since July 2017.
As the Syrian military and its allies advance on the ISIS' last stronghold south of Damascus, the jihadis' tactics grow more bloody.
Insurgents such as the Taliban and ISIS exert more control or influence than ever previously recorded by a Congress-mandated watchdog.
At least 25 people were killed by two bombs close to the headquarters of the Afghan intelligence services.
Fighters seemed to struggle with the leapfrogging exercises in particular.
The U.S.-led coalition and the axis of Russia, Iran and Syria both claim Iraq as an ally—and Baghdad may be the key to bringing them together.
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.