A civil war has consumed Myanmar since a 2021 coup deposed the civilian government, with the military battling a myriad of pro-democracy guerrillas and ethnic armed organisations.

Scattered anti-coup forces initially struggled to make headway, but won a string of stunning victories -- mostly in the north -- when many banded together for a coordinated offensive starting late 2023.

This year, the junta's China and Russia-backed forces have clawed back ground on the northern front and state media said its soldiers managed "to fully retake" the town of Thabeikkyin on Wednesday.

Thabeikkyin is about 100 kilometres (60 miles) north of the second most populous city of Mandalay and a lucrative hive of gold mining.

State mouthpiece The Global New Light of Myanmar said an anti-coup alliance attacked Thabeikkyin with "overwhelming strength" last August, but its counteroffensive retook the town after 17 major battles.

The junta last Thursday said it had recaptured the northeastern town of Nawnghkio on another key highway towards Mandalay city, fending allied rebels back further into the fringes of the country.

Earlier this week, guerrillas said they ambushed a junta flotilla of five ships sailing up the Irrawaddy River north of Mandalay -- another apparent sign of the military's renewed regional offensive.

With control of Thabeikkyin and Nawnghkio, junta forces control two flanks of the town of Mogok -- the renowned centre of Myanmar's ruby mining industry which rebel forces claimed last summer.

Mines excavating precious metals, gemstones and rare earth elements are coveted by all factions in Myanmar's civil war, allowing them to fill their coffers and fund their offensives.

Some 3.5 million people are living displaced amid the war, according to the United Nations, while more than half the nation of around 50 million now lives in poverty.