berrigan, his brother and josephite priest philip berrigan, and trappist monk thomas merton founded an interfaith coalition against the vietnam war and wrote letters to major newspapers arguing for an end to the war. in 1967, berrigan witnessed the public outcry that followed from the arrest of his brother philip, for pouring blood on draft records as part of the baltimore four. philip was sentenced to six years in prison for defacing government property. the fallout he had to endure from these many interventions, including his support for prisoners of war and, in 1968, seeing firsthand the conditions on the ground in vietnam, further radicalized berrigan, or at least strengthened his determination to resist american military imperialism.