Final answer:
The Buffalo Soldiers with the 24th and 25th Infantry regiments were notably known as Black Troops, serving with distinction despite facing racial barriers and leaving a significant mark in American military history.
Step-by-step explanation:
The Buffalo Soldiers were members of the 24th and 25th Infantry regiments, and they were known as Black Troops. These soldiers were African American regiments who served with distinction on the American frontier, in the Spanish-American War, the Philippine-American War, and both World Wars.
Facing segregation and discrimination, these men earned respect for their combat prowess and dedication, with some even being awarded the Medal of Honor for their actions in battle. Henry Flipper, the first African-Americann graduate of West Point, served among these notable cavalry units. The soldiers in these regiments, including the 'Smoked Yankees', played a substantial role alongside Teddy Roosevelt's Rough Riders during the Battle of San Juan Hill.