Either a primary source could be unavailable or a primary source could be extremely biased. For example, if a researcher was looking at King George, they might not want to use the diary of someone who despised King George as a big part of their research.
His killer wanted to unite all Serbs under one government not Austria.The Austrians wanted to punish Serbia plus the alliance system pulled one nation after another into the war.
Answer:
African Americans played an important role in the revolution. They fought at Fort Ticonderoga and the Battle of Bunker Hill. A slave helped row Washington across the Delaware. Altogether, some 5,000 free blacks and slaves served in the Continental army during the Revolution.
Explanation: