also , it is a crime to convey false reports or false statements with intent to interfere with the operation or success of the military or naval forces of the united states or to promote the success of its enemies when the united states is at war , to cause or attempt to cause insubordination , disloyalty , mutiny , refusal of duty , in the military or naval forces of the united states , or to willfully obstruct the recruiting or enlistment service of the united states .