1843-1901 1856-1924 1882-1945 casestudies decisionmaking executivebranch lusitania(steamship) maine(battleship) mckinley militaryleadership militaryleadershipmckinley militaryleadershiproosevelt militarypolicy panay(gunboat) politicalinstitutionsandpublicadministration(unitedstates) politicalscience president presidents roosevelt unitedstates warandemergencypowers william wilson woodrow