Mezue ahịrịokwu na-esonụ: Intrepid bụ bọọlụ ikuku hydrogen ma ọ bụ aerostat nke ndị Union Army Balloon Corps wuru maka iji ụgbọelu mee ihe n'oge Agha Obodo America. Ọ bụ otu n'ime balloon asaa e wuru maka Balloon Corps ma bụrụ otu n'ime nnukwu balloon anọ e mere iji mee ka ịrịgo elu dị elu na nnukwu ikike ibuli maka akụrụngwa telegraph na onye ọrụ. Ọ bụ bọọlụ a họọrọ maka Chief Aeronaut Thaddeus Lowe na-eleba anya na
Agha Fair Oaks.