Mezue ahịrịokwu na-esonụ: 1st Cavalry Regiment laghachiri Philippines na 1908 ma debe Fort Stotsenburg ruo afọ abụọ. Ntinye nke a dị jụụ karịa nke ikpeazụ ha, ndị agha ahụ laghachikwara n'ụlọ na 12 February 1910. Ndị agha A, B, D, na K nọ na Presidio nke San Francisco ma mesịa sonyere ndị ọzọ nke ndị agha ha na Presidio nke Monterey ruo 1 August 1914. N'ịga na Southern California, ndị 1st Cavalry nọ na San Ysidro na nzaghachi maka nrụgide na-eto eto na ndịda nke ókèala na Mexico. N'abalị iri abụọ na anọ n'ọnwa Ọgọstụ n'afọ 1915, ndị agha ahụ kwagara Calexico, California iji wusie ókèala ike ma chebe megide mwakpo nke "ndị ohi", Pancho Villa. Ha nọgidere na-eche nche n'ókèala mgbe General Pershing malitere
Ndị agha ịnyịnya nke mbụ esonyeghị na Agha Worldwa Mbụ, mana ọ nọgidere na-eche nche ókèala ruo mgbe Jenụwarị 19, 1923, mgbe ha gara Fort D. A. Russell, Texas. Nke a bụ ọkwa ikpeazụ ha dị ka ndị na-agba ịnyịnya, na n'oge ngagharị na 14 Disemba 1932, ndị agha ahụ kwụsịrị ma gafere na nyocha, na-ekele ịnyịnya ha ka ha hapụrụ ha ka ha bụrụ ndị ọrụ igwe. N'ịga na Fort Knox, Kentucky, ndị 1st Cavalry Regiment ghọrọ ndị mbụ na-arụ ọrụ na United States Army, ma jikọta ya na 13th Cavalry Regiment iji mepụta 7th Cavalry Brigade (Mecz). N'oge ọkọchị nke afọ 1939, 7th Cavalry Brigade (Mecz) sonyere na Plattsburgh Maneuvers ma nyere aka mepụta usoro ndị agha mbụ maka agha igwe. N'oge ọkọchị nke afọ 1940, Louisiana Maneuvers mere ka ndị agha kwenye na ọ dị mkpa ka ha mepụta ndị agha na-agba ọsọ na 1st Armored Division tọrọ ntọala na 15 July 1940. E degharịrị 1st Cavalry Regiment ịbụ 1st Armored Regiment n'otu ụbọchị ahụ, ma kenye ya na 1st Armored Brigade. N'oge na-adịghị anya, a ga-anwale ndị agha Amerịka ndị ọhụrụ a na-eji ụgbọ agha alụ agha.