Afghan War : Taliban fighters we meet are stationed just 30 minutes from one of Afghanistan's largest cities, Mazar-i-Sharif.

The "ghanimat" or spoils of war they're showing off include a Humvee, two pick-up vans and a host of powerful machine guns. Ainuddin, a stony-faced former madrassa (religious school) student who's now a local military commander, stands at the centre of a heavily-armed crowd.

The insurgents have been capturing new territory on what seems like a daily basis as international troops have all but withdrawn. Caught in the middle is a terrified population.

Tens of thousands of ordinary Afghans have had to flee their homes - hundreds have been killed or injured in recent weeks.

I ask Ainuddin how he can justify the violence, given the pain it's inflicting on the people he claims to be fighting on behalf of?

"It's fighting, so people are dying," he replies coolly, adding that the group is trying its best "not to harm civilians".

I point out that the Taliban are the ones who have started the fighting.No," he retorts. "We had a government and it was overthrown. They [the Americans] started the fighting."

Ainuddin and the rest of the Taliban feel momentum is with them, and that they are on the cusp of returning to dominance after being toppled by the US-led invasion in 2001.

"They are not giving up Western culture… so we have to kill them," he says of the "puppet government" in Kabul.

Shortly after we finish speaking we hear the sound of helicopters above us. The Humvee and the Taliban fighters quickly disperse. It's a reminder of the continuing threat the Afghan air force poses to the insurgents, and that the battle is still far from over.

We're in Balkh, a town with ancient roots, thought to be the birthplace of one of Islam's most famous mystic poets, Jalaluddin Rum.when it was still controlled by the government, but the outlying villages were held by the Taliban. Now it's one of around 200 district centres to have been captured by the militants in this latest, unprecedented offensive.

image captionA member of a Taliban "red unit" or special forces (kneeling, bottom left) poses with other Taliban in Balkh

One senior Taliban official said the focus in the north had been deliberate - not only because the region has traditionally seen strong anti-Taliban resistance, but also because it is more diverse.

Despite its core leadership being heavily dominated by members of the Pashtun majority, the official said the Taliban wanted to emphasise they incorporated other ethnicities too.

Haji Hekmat, a local Taliban leader and our host in Balkh, is keen to show us how daily life is still continuing.

The bazaar remains crowded, with both male and female shoppers.

We had been told by local sources that women were allowed to attend only with a male companion, but when we visit that does not seem to be the case. Elsewhere Taliban commanders have reportedly been far stricter.

All the women we see, however, are wearing the all-encompassing burqa, covering both their hair and face.

Haji Hekmat insists no-one is being "forced" and that the Taliban are simply "preaching" that this is how women should dress.

image captionThis young girl had her face uncovered in the bazaar - but older female shoppers wore burqas

But I've been told taxi drivers have been given instructions not to drive any woman into the town unless she's fully veiled.

The day after we leave, reports emerge of a young woman being murdered because of her clothing. Haji Hekmat, though, rejects allegations Taliban members were responsible.

Many in the bazaar express their support for the group and their gratitude towards them for improving security. But with Taliban fighters accompanying us at all times, it's difficult to know what residents really think.

The group's hardline views are at times in tune with more conservative Afghans, but the Taliban are now pushing for control of a number of larger cities.