Who brought the first horses to teaxs

In 1686 Robert Cavelier, Sieur de La Salle, acquired five horses from Caddo Indians in East Texas. The Caddos had a large supply of them in 1689 when Henri de Tonti was searching for La Salle. Mustangs brought some of the first Americans.

I'd say it was the Spanish who brought the first horses to Texas.

I'm not for sure tho