As many as 2,000 veterans planned to gather next week at the Standing Rock Sioux Reservation in North Dakota to serve as “human shields” for protesters who have for months clashed with the police over the construction of an oil pipeline, organizers said.

The effort, called Veterans Stand for Standing Rock, is planned as a nonviolent intervention to defend the demonstrators from what the group calls “assault and intimidation at the hands of the militarized police force.”

The veterans’ plan coincides with an announcement on Tuesday by law enforcement officials that they would begin blocking supplies, including food, from entering the main protest camp after a mandatory evacuation order from the governor. But protesters have vowed to stay put.

Opponents of the 1,170-mile Dakota Access Pipeline have gathered for months at the Oceti Sakowin camp, about 40 miles south of Bismarck. The Standing Rock Sioux and other Native American tribes fear the pipeline could pollute the Missouri River and harm sacred cultural lands and tribal burial grounds.

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