Mezue ahịrịokwu na-esonụ: Iwu agha na United States na-ezo aka n'oge n'akụkọ ihe mere eme nke United States mgbe a na-achịkwa mpaghara, steeti, obodo, ma ọ bụ United States dum n'aka ndị agha. N'ọkwa mba, ma onyeisiala mba Amerịka ma ndị omeiwu mba Amerịka nwere ikike, n'ime oke ụfọdụ, itinye iwu agha ebe ha abụọ nwere ike ịbụ ndị na-elekọta ndị agha. Na steeti ọ bụla, gọvanọ nwere ikike itinye iwu agha n'ime oke steeti ahụ. Na United States, e jirila iwu agha mee ihe n'ọtụtụ ọnọdụ, dị ka New Orleans n'oge Agha New Orleans; mgbe nnukwu ọdachi gasịrị, dị ka Nnukwu Ọkụ Chicago nke 1871,
Ala ọma jijiji San Francisco nke 1906, ma ọ bụ n'oge ọgba aghara, dị ka ọgba aghara agbụrụ Omaha nke 1919 ma ọ bụ ọgba aghara Lexington nke 1920; ndị isi obodo kwupụtara iwu agha iji chebe onwe ha pụọ na ime ihe ike, dị ka Nauvoo, Illinois, n'oge Illinois Mormon War, ma ọ bụ Utah n'oge Agha Utah; ma ọ bụ na nzaghachi maka ọgba aghara metụtara ngagharị iwe na ọgba aghara, dị ka 1934 West Coast waterfront strike, na Hawaii mgbe ndị Japan wakporo Pearl Harbor, na n'oge Civil Rights Movement na nzaghachi maka ọgba aghara Cambridge nke 1963.