Answer:
On the southwestern frontier, Americans received help from Spain. ... However, Bernardo de Galvez, governor of Spanish Louisiana, favored the Patriots. He secretly supplied medicine, cloth, muskets, and gunpowder to the Americans. When Spain entered the war against Britain in 1779, Galvez took a more active role.
The photograph.
Because it is made by someone other than Rosevelt but it is still first-hand information.
In sum, Stowe's Uncle Tom's Cabin widened the chasm between the North and the South, greatly strengthened Northern abolitionism, and weakened British sympathy for the Southern cause. The most influential novel ever written by an American, it was one of the contributing causes of the Civil War.
