XX. Also, it is agreed and assented that one peace and war be throughout the entire land, so that if any Irish or English shall make a hostile inroad in any county, the counties surrounding them shall make war and harrass them in their marches, so soon as they shall be warned by the wardens of the peace of the said county, or by the sheriff where the war shall arise; and if they shall not so do, they shall be held as maintainors of felons; and if they of the country where the war arises, suffer their marches to be laid waste by the enemy, and will