Rockefeller3.Beginning with a small oil refinery, this man‘s Standard Oil began to put competitors out of business.
Sectionalism refers to being loyal to a certain region in a country, but not to the country as a whole.
The answer to your question is gunpowder weapons.
siege warfare.
armored cavalry.
Hoped I Helped!
Answer:
WWI was ignited when Archduke Franz Ferdinand—heir to the Austro-Hungarian Empire—was shot to death by the Serbian nationalist Gavrilo Princip on June 28, 1914.
