MULA ABDULA, Iraq (AP) -- Among rolling wheat fields with machine-gun fire rattling in the distance, Kurdish fighters patrol the new frontier of their autonomous region of northern Iraq, dozens of miles from their official border. In front of them are Islamic militants, behind them is the Kurds' newly captured prize, stretches of oil-rich territory.
In Iraq's chaos, the Kurds are emerging as significant winners -- and their victories are fueling sentiment among their population to declare outright independence.
As Sunni insurgents swept over a large chunk of northern Iraq and barreled toward Baghdad the past two weeks, Kurdish fighters known as peshmerga seized territory of their own, effectively expanding the Kurdish-run region into areas it has long claimed. Most notably, they grabbed the oil center of Kirkuk. And in contrast to the Shiite-led government in Baghdad, which is in turmoil, the Kurds are growing more confident, vowing to increase oil sales independent of the central government.
The gains have also brought the Kurds challenges barely imaginable just days ago. They must defend a new, 620-mile (1,000 kilometer) frontier against Sunni insurgents, led by an al-Qaida breakaway group, the Islamic State of Iraq and the Levant. Some 300,000 Iraqis who fled the insurgent advance have flooded into Kurdish areas, an extra burden to an already cash-strapped autonomy government.
And the Kurds risk a backlash. In Kirkuk, Sunni Arabs and ethnic Turkmens -- who have long opposed Kurdish claims over the city -- threaten a revolt if the Kurds don't share administration of the city and any oil revenues.
Still, the sense of exuberance is palpable among Kurds, who make up 20 percent of Iraq's mostly Arab population.
"Now that the peshmerga took back our disputed areas, we should have our own country. We deserve it," said Khaled Ismail in the Kurdish area of Khazer.
The 19-year-old student wants independence so Kurdistan can sell its own oil and have the status statehood brings, like a passport, representation internationally -- and a national soccer team. "If we had a Kurdish team in the World Cup, it would be great," he said.
Another man pointed to the strength of the peshmerga in contrast to the troops of Shiite Prime Minister Nouri al-Maliki's government, who collapsed in the face of insurgents.
"The peshmerga and al-Maliki's army are as different as the ground and the sky," said 59-year-old Ahmed Omar, wearing traditional Kurdish baggy pants. He also wants statehood. "We don't want other people to interfere in our affairs."
Declaring independence -- and formally fragmenting Iraq -- is not easy. The United States and neighboring Turkey oppose Kurdish independence. And the Kurds can expect constant clashes not just with insurgents but also with Iraqi forces if they unilaterally break away and claim the areas they grabbed, said Kurdish analyst Hiwa Osman. "If the Kurds want true independence, (there) has to be a treaty," he said.
Given that resistance, the Kurdish government is pressing for even greater powers of autonomy but not full independence.
The Kurds' territorial grab is substantial. The recognized Kurdish autonomous region -- defined as three northern provinces -- effectively expanded by 40 percent, estimated Gareth Stansfield, an expert on Kurdish affairs.
The peshmerga moved into territory all along the edges of their region, from near the Rabia border crossing into Syria in the northwest to the city of Jalula in the southeast near the Iranian border.
The Kurds say the move was to protect those areas when the military fled after the Islamic State captured the northern city of Mosul on June 6.
But many of these areas have large Kurdish communities that the Kurds have demanded be incorporated into their zone -- making them unlikely to give them up.
This week, the peshmerga patrolled the front line separating them from Sunni insurgents along wheat fields in an area known as Mula Abdula. The area is more than 50 kilometers (30 miles) from the official Kurdish zone's borders. The area was littered with bullet casings, and gunfire and the occasional thud of a tank shell could be heard from fighting further down the road.
Some 25 kilometers (15 miles) behind them, in Kurdish hands, was Kirkuk and surrounding oil-rich lands.
"It's by far the biggest field in the north, and now the Kurds sit on top of it," Stansfield said.
The Kurdish autonomous zone has its own oil resources, currently producing about 220,000 barrels a day, and it has long argued with Baghdad over sharing revenues from that oil. The Kurdish government in May sold oil independently of the central government for the first time-- around 1.05 million barrels, shipped to Turkey. In retaliation, Baghdad stopped giving the Kurds the proportion of the central budget they are entitled to receive.