All 160 US Counties of Former Mexican Territories in 1854 with a Map
Between 1846 and 1854, the U.S. annexed many territories that had originally belonged to Mexico. Can you name every county that existed in the former Mexican territories in 1854, when the Treaty of Mesilla (Gadsden Purchase) went into effect?
Because it’s historically significant? I don’t think someone with an “All North American Countries” quiz should be talking crap about a quiz’s existence, as if that hasn’t been done over a million times already.