How did slave who were still on the plantations during the war the union cause? a. they poisoned horses on the plantations that might be used in the war? b. they pretended they were two i’ll to support the slaveholders? c. they did things to sabotage production on the slaveholders plantations? d. they sent spy reports to the north on what they overheard

The use of horses in World War I marked a transitional period in the evolution of armed conflict. Cavalry units were initially considered essential offensive elements of a military force, but over the course of the war, the vulnerability of horses to modern machine gun and artillery fire reduced their utility on the battlefield. This paralleled the development of tanks, which would ultimately replace cavalry in shock tactics. While the perceived value of the horse in war changed dramatically, horses still played a significant role throughout the war.

All of the major combatants in World War I (1914–1918) began the conflict with cavalry forces. Germany stopped using them on the Western Front soon after the war began, but continued limited use on the Eastern Front

The answer coastal regions and peary land