Tensions are running high between autonomous Kurdistan regional government (KRG) and Baghdad after both sent troops to reinforce areas along their disputed internal border, bringing them close to confrontation in their long-running feud.
Dressed in military uniform and flanked by troops, KRG President Massoud Barzani visited Kurdish-controlled areas of Kirkuk, a city long seen as a flashpoint for Arab-Kurdish tensions after the US military withdrawal a year ago.
"Kurds, throughout history, did not choose war as a means, but this does not mean they will sit handcuffed in the face of oppression," he said on the outskirts of Kirkuk.
"We are against the war and we do not like war, but if things come to war, then all Kurdish people are ready to fight in order to preserve the Kurdish identity of Kirkuk."
Barzani's sensitive visit and tough rhetoric come as US officials try to negotiate an end to the military standoff that began last month when Baghdad and northern region both sent troops to reinforce positions around cities on their internal border.
Although outside the three northern Iraqi provinces run by the KRG, Kirkuk has historically been claimed by the Kurdish region. A census to determine whether the city has a Kurdish or Arab majority has long been delayed.
Kirkuk sits on some of the world's largest oil reserves and fields around the city produce about a fifth of Iraq's total crude exports of 2.6 million barrels per day.
American troops acted as a buffer between the two regions until their departure. Since then, the federal government and the KRG have increasing sparred over control of land and oil.
The KRG relies on the central government for its share of the national budget. But tensions have grown since the Kurdish region signed deals with major oil firms like Exxon and Chevron to develop its oilfields, a move Baghdad sees as an unconstitutional challenge to the central government.