Dee ihe na-aga n'ihu na paragraf a - Site na 1881 ruo 1891, Gaston jere ozi n'ókèala, bụ́ nke gụnyere ime ihe agha megide ndị Apache na ndị Sioux. O sonyere na Spanish-American War, na-eje ozi na Cuba site na 1899 ruo 1902, ma mesịa gaa Philippines. Gaston duziri ogige enyemaka mgbe ala ọma jijiji San Francisco nke 1906 gasịrị. Ọ gụsịrị akwụkwọ na United States Army War College na 1912, na n'agbata November 1913 na Eprel 1914, mgbe ọ gachara ọzọ na Philippines n'agbata 1908 na 1910, o nyere iwu na Cavalry School na Fort Riley. Gaston mechara duo ndị agha nke isii nke ndị agha na-agba ịnyịnya ma jee ozi na ókèala na Mexico na Pancho Villa Expedition
n'ụdị ahụ.