Mezue ahịrịokwu na-esonụ: E guzobere ndị agha mbụ na Delaware mgbe ndị Sweden na-akwaga ebe ahụ ji ngwá agha gbachitere Fort Christina (nke bụ́ ebe ndị Sweden bi n'oge ahụ) megide ndị mwakpo Dutch. N'oge American Revolutionary War, Delaware welitere ọtụtụ nkeji nke ndị agha na-akwado akụkụ Patriot nke agha ahụ. N'agha nke 1812, ndị ọrụ afọ ofufo nile nke Delaware hụrụ ọgụ na Lewes, ebe ha mejupụtara ọtụtụ ndị agha nke chụpụrụ ndị agha ụgbọ mmiri Britain na-achọ ịchịkwa Osimiri Delaware. N'agbanyeghi na gọọmentị etiti machibidoro ndị ọrụ afọ ofufo iwu na mbido agha Mexico na America, otu ndị ọrụ afọ ofufo a zụlitere na Delaware ga-eje ozi n'agha ndị Contreras,
Cherubusco, Molino del Rey, na Chapultepec, na-efunahụ ọtụtụ ndị ikom nke na a na-akpọ ndị agha ahụ "Nke Iri na Otu Ọbara Ọbara". N'oge Agha Obodo America, Delaware ga-akpọlite ọtụtụ ndị agha iji kwado ihe kpatara Union. Ndị agha ndị a ga-enwe ihe ịga nke ọma n'agha ndị a lụrụ na Fredericksburg, Chancellorsville, na Gettysburg. N'oge Spanish-American War, a kpọkọtara 1st Delaware Volunteer Infantry n'ọrụ gọọmentị mana etinyeghị ya na mba ofesi. Site na iwu nke Militia Act nke 1903, a chịkọtara ndị agha obodo niile n'ime National Guard nke United States, na-eme ka ndị agha obodo si n'aka ndị gọọmentị kwadoro ma na-achịkwa ike gaa na ngalaba nchekwa nke ndị agha gọọmentị etiti.