Also, most existing indigenous civilisations had collapsed due to genocide and the diseases imported by the European invaders. It was literally a post-apocalyptic scenario. The survivors were basically Mad Maxing it, only cars hadn’t been invented yet so they had to use horses.
In fairness it only took like 30 years to develop advanced car culture.
The utility of the horse and the breeding and lack of predators would’ve made them pervasive in no time.
Also, most existing indigenous civilisations had collapsed due to genocide and the diseases imported by the European invaders. It was literally a post-apocalyptic scenario. The survivors were basically Mad Maxing it, only cars hadn’t been invented yet so they had to use horses.