The answer to the question above is the Battle of Fredericksburg.
At the Batlle of Fredericksburg, General Robert Lee led a force of 75,000 Confederates soldiers against General Ambrose Burnside. The Battle of Fredericksburg happened on December 11 to 15, 1862, in Fredericksburg, Virginia.
After the battle at Bunker Hill in 1775, George Washington C improved the Continental army.
Andrew Carnegie was one of the most successful businessmen and most recognized philanthropists in history. He promoted the participation of the United States in the industry being the pioneering of the Age of Steel.
His steel empire produced the raw materials that built the infrastructure of the United States due to he produced the steel to make machinery and transportation possible throughout the nation.
The 3rd one! they invested heavily in the sugar and tobacco industries in cuba