Whakaotihia te rerenga e whai ake nei: I te Pakanga o Mexico-American, i tono a Leonard Ross i roto i te 4th Illinois Volunteer Infantry Regiment, i whakauruhia i te Pipiri 1846. I whakatairangahia ia mai i te taumata o te tangata ki te rangatira tuatahi i te Mahuru 4, 1846, na te rangatira rangatira, a Kapene Lewis W. Ross, tona tuakana. I roto i te reta ki tana wahine, i kii a Kapene Ross ko Leonard "he pai ki a ia te whakahonore me te mahi hei rangatira tino pai. E kore ia e whai mana [sic] e ahau te tuku ki a ia rite hohoro rite taea i te toenga i ahau o te tuhinga i runga i te ringa. " I whai ake nei ka whai wāhi nui a Leonard Ross ki ētahi pakanga, tae atu ki te
Te whakapae o Veracruz me te Pakanga o Cerro Gordo. E ai ki tētahi tuhipānui i runga i tētahi rārangi rēhita i hainatia e Kapene Ross, ā, he rā i te 30 o Aperira 1847, kua tukuna e Lieutenant Ross tana tono whakarere i taua rā, ā, kua hoki mai ia ki te kāinga i te pakanga. Heoi anō, i mōhio hoki a Kapene Ross kāore i whakaaetia te wehenga o te Lieutenant Ross, nō reira i kiia ai ia he kore noa iho, ahakoa kāore he pānga kino. He korero nui mo te mahi a Leonard Ross i te Pakanga o Mexico-Amerika kua whakawhiwhia e te State Historical Society o Iowa.