WATCH | On Sunday afternoon, more than a thousand people came together in Washington D.C. to march in opposition to the Dakota Access Pipeline.
Anti-pipeline activists swarm D.C.
A diverse group marched against the pipeline, the $3.8 billion project that has sparked controversy due to its proximity to the Standing Rock Sioux reservation in North Dakota.
The Water Is Life march and rally -- which started at the Department of Justice and ended at the Washington Monument -- attracted swarms of activists, who argued the pipeline would threaten cultural sites and drinking water of the Standing Rock Sioux tribe.
The march also attracted high-profile marchers, including actress Shailene Woodley, 24, who gained notoriety following her arrest in North Dakota last month while she protested the construction of the pipeline.
Woodley pled not guilty to misdemeanor charges of criminal trespassing and participating in a riot in October.
Here's one of Woodley's Instagram posts from the march.
Woodley also livestreamed her day at the protest.
The march was organized in conjunction with a concert at DAR Constitution Hall, which was intended to help raise funds for the protests in North Dakota to continue. The sold-out concert featured Dave Matthews, Graham Nash, Tim Reynolds and Ledisi, among others.
As Rolling Stone pointed out, Matthews opened his set with his 1998 single, "Don't Drink the Water," written about both "the persecution of Native Americans and the apartheid in Matthews' native South Africa."
WATCH | The Dave Matthews Band performed at the end of the night. Eighteen members of the Standing Rock Sioux, including the Lakota Thunder drummers and singers, also performed during the march, the rally and on-stage in the evening.
It was an amazing feeling, singing our songs that are over 100 years old.
'An amazing feeling'
“It was an amazing feeling, singing our songs that are over 100 years old," Laundi Keepseagle, the director of LastRealIndians.com, told Circa.
"Our drummers were crying. It’s so powerful for us to bring our music to the Capitol because our treaties were signed at the Capitol."
'People are getting discouraged'
Keepseagle said Sunday's protest was essential, especially because the Army Corps of Engineers announced this week that they would close the protest site in North Dakota on December 5.
"The hard part about being in North Dakota is that we are confined in this place where all around us there is so much anger and hostility," she said. "And so people are getting discouraged because of the weather and the eviction notice that came last week from the Army Corps of Engineers."
Dave Matthews inspired the event
The Sunday event originated from a meeting which took place in October when Dave Matthews visited the camps in North Dakota, Keepseagle said.
According to her, Matthews offered to do whatever they needed to help the water protectors.
“It was an awesome event, and the cool thing about it was I got to choose people who have most influenced me” to participate, said Keepseagle.
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