Submarine crews are undergoing more arduous training to sail farther from China, and it's taking a toll.

National-security officials say Chinese submarines and icebreakers pose a new military threat from the High North.

China’s submarine fleet, long noisy and outdated, is getting quieter and deadlier, a new analysis warns, as it closes the gap with the US within the First Island Chain, a string of islands that could ...

(CNN) — Russia and China have conducted their first-ever joint submarine patrol in the Pacific, according to reports in state-run media. The patrol by diesel-electric submarines began in early August, ...

The Pakistan Navy expects its first Chinese-designed submarine to enter active service next year, the country's top admiral told Chinese state media, bolstering Beijing's bid to counter regional rival ...

BEIJING (Reuters) -The Pakistan Navy expects its first Chinese-designed submarine to enter active service next year, the country's top admiral told Chinese state media, bolstering Beijing's bid to ...

(CNN) — Russia and China have conducted their first-ever joint submarine patrol in the Pacific, according to reports in state-run media. (CNN) — Russia and China have conducted their first-ever joint ...

Russian and Chinese submarines have carried out their first-ever joint patrol in the Asia-Pacific, the Russian navy's Pacific Fleet has said, building on a pattern of increasing military cooperation ...

A Chinese Y-8 anti-submarine aircraft flew alongside Russian IL-38 planes to practice destroying the decoy submarine. While the United States, the UK, and Japan continue to carry out the collaborative ...

North Korea's state media released photos Thursday of what it said was the hull of a nuclear submarine. Its leader denounced ...