Rubuta ci gaba don wannan sakin layi - A farkon karni, Amurka ta ci gaba da halin sa na shiga tsakani, wanda ke da nufin kare bukatun ta kai tsaye a yankin. An bayyana wannan a hukumance a cikin Theodore Roosevelt's Big Stick Doctrine, wanda ya canza tsohuwar koyarwar Monroe, wanda kawai ya yi niyyar hana tsoma bakin Turai a cikin yankin. A karshen yakin Spain da Amurka, sabuwar gwamnatin Cuba da Amurka sun rattaba hannu kan gyaran Platt a 1902, wanda ya ba Amurka damar shiga tsakani a cikin al'amuran Cuba lokacin da Amurka ta ga ya zama dole. A Colombia, Amurka ta nemi a ba ta wani yanki a Panama
don gina tashar da ake tsammani a fadin isthmus. Gwamnatin Colombia ta yi adawa da wannan, amma tawaye na Panama ya ba Amurka dama. Amurka ta goyi bayan 'yancin kai na Panama kuma sabuwar al'umma ta ba da izini. Waɗannan ba su ne kawai tsoma bakin da Amurka ta yi a yankin ba. A cikin shekarun farko na karni na ashirin, an sami hare-haren soja da yawa a Amurka ta Tsakiya da Caribbean, galibi don kare bukatun kasuwanci, wanda aka sani da "Banana Wars".