Locus are a larger version of a grasshopper. When they breed they do it abundantly and they can cause serious crop damage when they fly in swarms. By the way this would be more of a science question. ;)
Your second question is a history one: I believe the answer is Nelson Mandela. He was the first democratic president of the Republic of South Africa. He was "sworn in" in 1994 at the age of 74 or 75 I believe.
Answer: Wentworth Cheswell was an American assessor, auditor, Justice of the Peace, teacher, and a Revolutionary War veteran.
I would assume it came from a military official representing the Northern States
Answer:
Roman virtues were warrior virtues that were appropriate to farmers and warriors. In order to acquire those virtues, men needed to fight wars. Thus, one major benefit of expansion was glory! ... Even common soldiers earned great prestige when they had fought in an important Roman victory.
Answer:
The French and Indian war !