Even as late as World War II
To an surprising degree, the Germans depended on horse transport in WW II. Despite pioneering the blitzkrieg as a tactic in war, the Germans lacked the industrial capacity and petroleum supply to fully mechanize their military. As a result, they often relied on horses to move and support their military in the field.
The Wehrmacht were infinitely more horse dependent than us
A primary cog in their war machine as late as WWII