Only one bishop spoke out strongly against those wars, the Romanian Greek Catholic eparch of St. George in Canton, Ohio.  If I remember correctly he went so far as to declare it an unjust war and forbade and members of his eparchy to take part in it.  For this he was unjustly vilified by many in the right wing of US Catholicism.   From his Wikipedia entry:  "Botean achieved a measure of national and international notice in his Lenten pastoral letter of 2003[2] which spoke out against the Iraq War. The letter was a direct condemnation of the conflict, and termed it "objectively grave evil, a matter of mortal sin".[2] These were the most outspoken terms committed to paper by a United States Catholic bishop over the war.[3] No other US ordinary has directly condemned the Iraq war."