Nyorai kupfuurira kweiyi ndima - Kubva muna 1881 kusvika muna 1891, Gaston akabatira pamuganhu, uyo zvikurukuru waibatanidza zviito zvechiuto mukurwisana navaApache navaSioux. Akatora rutivi muHondo yeSpain neAmerica, achishanda muCuba kubva muna 1899 kusvika muna 1902, uye akazoenda kuPhilippines. Gaston aitungamirira misasa yebetsero yechigarire pashure pokudengenyeka kwapasi kweSan Francisco muna 1906. Akapedza kudzidza kuUnited States Army War College muna 1912, uye pakati paNovember 1913 naApril 1914, mushure mekufamba zvakare kuPhilippines pakati pa1908 na1910, akatungamira Chikoro cheCavalry kuFort Riley. Gare gare Gaston akarayira 6th Cavalry Regiment uye akashanda pamuganhu neMexico uye paPancho Villa Expedition
mumamiriro ezvinhu akadaro.