Gavin Williamson warned that Russian ships pose a threat to millions of Britons.
Cyberattack and artificial intelligence are already being integrated into the arsenals of the world's leading militaries.
China's official military newspaper compared nuclear weapons to a sword of Damocles hanging over humanity, but said upgrades were necessary.
China has for the first time revealed its Arctic Policy. Will it follow Russia in bringing military power to the resource-rich region?
China, Egypt, India, Iraq, Saudi Arabia, Sudan, Syria and Turkey were among those looking to get their hands on the S-400 missile defense system.
The Kremlin has vowed it will not be caught off guard if war breaks out.
Russia's Foxhound aircraft is a Cold War-era warplane earmarked for high-speed, high-altitude pursuits of U.S. and other incoming aircraft.
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.
General Sir Nick Carter warned the British government about further cuts to its armed forces.
Moscow was flexing its muscles in the border regions in recent months.
A year after winning Aleppo, the Syrian military and its Russian ally launched a devastating offensive against the last rebel province of Idlib.
There are no signs for optimism in U.S.-Russia ties, warned the head of Moscow's International Affairs Committee.
Russia used electronic and conventional warfare to take down a baker's dozen drones.
Leading NATO and Russian commanders will have their first meeting since 2013, when Obama banned talks, blaming Putin for the crisis in Ukraine.
"In the skies over Syria, it's really just been a treasure trove for them to see how we operate," Lieutenant General VeraLinn "Dash" Jamieson said.
The rate of fire increased by a third compared to the year prior, as Russia continues to pad out its Arctic military capabilities.
Moscow says it is fed up with "groundless" U.S. accusations that it is obstructing U.S. observation jets, so it will now do exactly that.
The Kremlin has expressed concern over the missile shield the U.S. provides in Eastern Europe, near Russia's western border.
Russia is fortifying its massive military along two tense boundaries in its farthest western and eastern corners.
All but one of Russia's previous radar stations are based in the country's west, near Europe.
The U.S. is widely considered the world's top military power, but Russia and China are rapidly improving together and North Korea has achieved historic success.
Both countries share land borders with Kim Jong Un's secretive state.
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?
Militaries around the world are working to develop mechanized skeletons that seek to give soldiers added muscle in running, jumping and lifting.
Japan said Moscow had "big clout" with North Korea and asked Russia to cooperate.