Ramba uchiverenga ndima iyi - Akapiwa basa muChikwata chechi21 cheVashandi, McAndrew akatanga kushanda kumadokero kweUnited States, uye akapinda muHondo yeGhost Dance yokurwisa vaSioux muna 1890-1891. Akasimudzirwa kuva lieutenant wokutanga muna 1894, uye akapiwa 3rd Infantry. McAndrew akashanda muCuba munguva yeHondo yeSpain neAmerica, uye akapinda muhondo yeEl Caney
uye Kurwiswa kweSantiago. Muna 1899, McAndrew akasimudzirwa kuva kaputeni, uye akashanda muPhilippines panguva yePhilippine-American War. Kubva muna 1905 kusvika muna 1906, akashanda ne3rd Infantry muSkagway, Alaska.