 Nyorai kupfuurira kweiyi ndima - Muna 1827, akapinda muAddiscombe Military Seminary uye basa reEast India Company. Akabatana neBengal Artillery muna 1828, uye muna 1829 akasvika muCalcutta. Muna 1837 akagadzwa kuva mukuru wemauto ehondo uye akasimudzirwa kuva Lieutenant. Makore maviri gare gare, akagadzwa kuti ave Commissioner of Ordnance kuKabul field force. Muna January 1842, muHondo Yokutanga yeAnglo-Afghan, Eyre nemhuri yake vakasungwa naAkbar Khan. Kwemwedzi inoda kusvika mipfumbamwe ari musungwa, Eyre akanyora zvaiitika kwaari, achishandisa mifananidzo yevamwe vakuru vakuru nevakadzi. Manyoro acho akaendeswa kunze kwenyika kushamwari muBritain India uye akazobudiswa muEngland seMilitary Operations at Kabul 1842. Mhuri yekwaEyre yakaponeswa naSir George Pollock muna September 1842. Muna 1844 Eyre akagadzwa kuti atungamirire zvombo zvehondo zveGwalior. Akanga ane mutoro wokununurwa kweKukombwa kweArrah. Akatora rutivi muKunyaradzwa kweLaknow, mukati meKupandukira kweIndia kwa 1857. Akakwidziridzwa kuva Lieutenant Colonel gore iroro uye kuva Brevet Colonel gore rakatevera racho. 