Mezue ahịrịokwu na-esonụ: Ọrụ nke ndị ọrụ mgbaàmà na Spanish-American War nke 1898 na ndị na-esote
Nnupụisi Philippines dị n'ọ̀tụ̀tụ̀ buru ibu karịa ka ọ dị n'Agha Obodo. Na mgbakwunye na akara ngosi anya, gụnyere heliograph, ndị agha ahụ nyere ekwentị na telegram waya waya na eriri nkwukọrịta, na-akwalite iji ekwentị na ọgụ, na-eji foto ọgụ, ma na-emegharị ojiji nke balloons. N'oge na-adịghị anya mgbe agha ahụ gasịrị, Signal Corps wuru Washington-Alaska Military Cable and Telegraph System (WAMCATS), nke a makwaara dị ka Alaska Communications System (ACS), na-ewebata telegraph mbụ na-enweghị eriri na Western Hemisphere.