Regarding “outrages,” both sides were complaining that the other side wasn’t being nice at the time. For the big picture regarding what Monroe Station was all about, note that MSG Gen. Tom Harris was headquartered in Monroe County, Mo. All southern-supporting soldiers in the entire 2nd Congressional District had been ordered to rendevous with him.
“The State Guard companies flocked to Gen. Harris in such numbers that by the 5th of July he had probably 500 men in his camp near Florida. By their scouts and spies the Federal military commanders were informed of his doings....”
For an extensive sketch of events encompassing Monroe Station, refer to the 1884 History of Marion County, pp. 381-389. This detailed account pretty much gives chapter and verse regarding who all the players were and what was going on.