Title: Canadian Armed Forces.
Question: What international exercises does the RCN partake in?

Title: Pacific War.
Question: How many battleships were in Kurita's "Center Force"?

Title: On the Origin of Species.
Question: Which institution bought 500 copies of the book, ensuring that a large number of people would have access to it?

Title: Hunter-gatherer.
Question:
When did the use of agriculture begin it's spread?