US-backed fighters are clearing the final, tiny stronghold of the ISIS “caliphate” in Syria, transporting thousands of war-weary evacuees from the area for care and questioning over the weekend.

Fighting is focused on Baghouz, a sunburnt, bomb-scarred village spanning just a fifth of a square mile along the Euphrates River — and the only scrap of land still held by ISIS.

The village is all that remains of the so-called caliphate that once stretched over a third of Iraq and Syria.

It’s become such a hellscape of air strikes and privation that even hardened ISIS supporters were evacuating last week. The rugged crowd included hundreds of men, some elderly or injured, who waited seated in lines to be patted down and questioned as possible jihadists or sympathizers.

Villagers in tattered clothing told reporters they’d been subsisting on dry, moldy flatbread, grass and filthy water.

“There were bombs falling everywhere,” one evacuee, a Canadian ISIS “bride,” told the Times of London. “You’d wake up in the morning and there would be the tail of a bomb sticking out of the ground near you.”

Others said they’d been held by ISIS as human shields, including an Iraqi housewife who gave her name as Alia.

“There was so much blood,” she told the Sunday Times of London, saying she had traveled to the caliphate to rescue her two daughters.

Conditions were so bad that some ISIS leaders urged civilian supporters to leave the village — though in recent days, one boss was beheaded for doing so, according to the Syrian Observatory for Human Rights.

About 60 of those evacuated last week died of malnutrition while being transported in the open backs of some 40 trucks more typically used to transport sheep. One woman gave birth in a truck.

Officials said they hoped to evacuate the last 2,000 civilians by Saturday, after which only the final few hundred militants and their most ardent supporters will remain.

Those diehard adherents are now hiding in a series of tunnels beneath the bomb-beaten ground, the Sunday Times said.

Many will fight to the death.

“They will be faced with a choice,” said Syrian Democratic Forces spokesman Adnan Afrin. “War or surrender.”

The fall of Baghouz will likely bolster President Trump’s hopes of bringing home the bulk of the 2,000 US troops currently in Syria, most of them training the Kurdish-led Syrian Democratic Forces. The White House said last week that 400 troops would stay behind indefinitely.

ISIS, meanwhile, is expected to retreat into stubborn — and still deadly — sleeper cells throughout Syria, Iraq, Egypt and West Africa.

With Wires