Mezue ahịrịokwu na-esonụ: Otu n'ime ngwa agha ndị a kasị mara amara n'oge gboo, bụ́ nke a na-agba ọkụ ngwa ngwa, bụ́ egbe Gatling, ndị agha Union ji ya mee ihe mgbe ụfọdụ n'oge Agha Obodo America, nke bụ́ oge mbụ e ji ya lụọ agha. E mechara jiri ya mee ihe n'ọtụtụ agha agha, gụnyere Agha Boshin, Agha Anglo-Zulu na mwakpo nke
Ugwu San Juan n'oge agha Spanish-American. Ndị agha Pennsylvania jikwa ya mee ihe n'oge Great Railroad Strike nke 1877, kpọmkwem na Pittsburgh. A na-etinyedị égbè Gatling n'ụgbọ mmiri.