[Letter from the Secretary of War to the Governor of Pennsylvania] War Department, 20^th March 1799. Sir, To suppress the insurrection now existing in the Counties of Northampton, Bucks, and Montgomery in the State of Pennsylvania, in opposition to the laws of the United States, the President has thought it necessary to employ a military force, to be composed in part of such of the militia of Pennsylvania, whose situation, and state of preparation will enable them to march with promptitude. The corps of militia first desired on this occasion are the Troops of Cavalry belonging to this City, and one Troop from each of the Counties of Philadelphia, Bucks, Chester, Montgomery and Lancaster. These Troops I have the honour to request your Excellency will order, to hold themselves in readiness to March on or before the 28^th instant under the command of Brigadier General Macpherson. I have the honour to be, with great respect, Sir, your obedient Servant (Signed) James McHenry His Excellency, Governor Mifflin.