Kammala wannan jumla: Tun lokacin da aka kafa Dokokin Monroe Gwamnatin Amurka ta nemi kuma ta sami matsayi mai tasiri a Yankin Yammacin Duniya. A cikin shekarun 1930, an maye gurbin sa hannun Amurka a yankin, wanda ya fara a 1898 (duba Yakin Amurka na Spain da yaƙe-yaƙe na banana) a madadin fitattun mutane na gida da kamfanonin Amurka, ta hanyar manufofin makwabta masu kyau wanda aka sanya shi a hukumance a Yarjejeniyar Montevideo a 1933. Tasirin Amurka a yankin ya kasance mai mahimmanci a lokacin yakin basasa kuma ya hada da
Amurka ta mallaki sabon ginin Panama Canal.