What european country was responsible for the reintroduction of horses to the united states?

Spain

Explanation:

In 1493, Spanish horses first step on American land on La Espanola Island, today Saint Dominic, and are the direct ancestors of all American "Creole" horses. Once acclimatized to the new environment and increased its creation with subsequent imports, it quickly reproduced, in a few years, extended to the other Antilles and moved to the Continent. The wild horse, descended from horses brought from Spain to America, is a symbol of the Western United States, but its proliferation under protective laws has become a living space problem in the country.

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.

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