The real causes of World War I included politics, secret alliances, imperialism, and nationalistic pride. However, there was one single event, the assassination of Archduke Ferdinand of Austria, which started a chain of events leading to war.
Answer:
A. Abraham Lincoln was elected president of the United States
The commander-in-chief role addresses major problems, while the chief of state role is mostly symbolic.
Iron and ore help create steamboats and railroads for transportation or goods
Hitler ordered a conquest of the Low Countries to be executed at the shortest possible notice to forestall the French and prevent Allied air power from threatening the vital German Ruhr Area. It would also provide the basis for a longterm air and sea campaign against Britain.