NIAGARA FALLS, N.Y. -- The U.S. Army Corps of Engineers says all Dakota Access Pipeline protesters have until Dec. 5 to leave the area, but many protestors say they are not ready to give up their fight -- and many Western New Yorkers are continuing to show signs of their support.

Those in the organization Niagara Falls Water Protectors gathered Sunday at Military Road and Niagara Falls Blvd for a march to emphasize the importance of protecting water resources everywhere, including in North Dakota.

The construction of Energy Transfer Partners' $3.7 billion pipeline would span four states in the Great Plains and Midwest. It would threaten the water resources for the Standing Rock Sioux Tribe if oil were to leak.

Charles Harris, a community activist with the Niagara Falls Water Protectors, said the Dakota Access Pipeline could be seen as a cancer to water resources capable of spreading.

The pipeline is also being built on land sacred to the Standing Rock Sioux Tribe.

In September, members of the local Seneca Nation traveled 1,400 miles to Cannon Ball, N.D. to stand in solidarity with the Sioux Tribe.

They are among thousands who have traveled to North Dakota to support the Standing Rock Sioux people.

In Western New York, multiple protests have been held, including a fundraiser Saturday evening.

Recently the protests have intensified after officers have used rubber bullets, tear gas and water hoses on demonstrators.

Last Sunday hundreds were hurt in a standoff with law enforcement on a bridge near Cannonball, N.D. Recently Morton County Sheriff Kyle Kirchmeier said in an Associated Press report that these measures have been used as protestors become increasingly aggressive.

Harris said while the recent order from the U.S. Army Corps of Engineers is disheartening, he still believes it is important for those against the pipeline to make their voices heard.

"All we can do sometimes is organize and fight for what we believe in," he said.

The Associated Press contributed to this report.