https://en.wikipedia.org/wiki/Dakota_Access_Pipeline_protest...
> In September 2016, construction workers bulldozed a section of land the tribe had identified as sacred ground and when protesters entered the area security workers used attack dogs which bit at least six of the protesters and one horse.
>At least six protesters were treated for dog bites, and an estimated 30 were pepper-sprayed before the guards and their dogs left the scene in trucks.
>In May 2017, internal TigerSwan documents leaked to The Intercept and other documents obtained through public records requests revealed a close collaboration between the pipeline company and local, state, and federal law enforcement as they carried out "military-style counterterrorism measures" to suppress the protesters.