The history of martial law in Spokane as I know.

First declared at city level.
The City of Spokane banned public speaking in 1909, hoping to stifle the various worker’s movements.

Then State Level using forces OKed by the US war department.
A brief military occupation of Spokane by the National Guard and a declaration of martial law by Governor Ernest Lister. They arrested anyone belonging to the IWW.

Some of what I learned from all this was that the conflict spread and appears both sides had supporters who escalated things beyond what the leadership wanted and there were casualties on both sides. Some blame the uneven application of martial law, IE protecting only one side of things with law enforcement.

From an equipped standpoint, it would seem getting good information about current events would be important for preparing for such unrest.