Military veterans plan to gather at the Standing Rock Reservation in North Dakota next week to show their support for those camped in protest of the four-state Dakota Access pipeline.

Veterans Stand for Standing Rock says 2,000 veterans will gather Sunday in Fort Yates, which is on the reservation. The organization says they'll be bused to the protesters' main camp on Monday and spend most of Tuesday and Wednesday on the front lines.

The group has set up a page at GoFundMe.com to raise money for food, transportation and supplies. As of Wednesday afternoon, it had raised nearly $700,000 of its $1 million goal.

The pipeline is designed to carry oil from North Dakota to Illinois. Opponents, including the Standing Rock Sioux tribe, say it will harm drinking water and cultural sites.