The answe to this question is accurate calendar
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The methods that have resulted in the greatest contribution to global security were: <span>military they pledged for the common defense and the stronger and bigger the were the better protection.
Unlike in the past, the greatest military in Modern Era is not possessed by the countries that have the most soldiers, but by those who possessed the most advanced mass destroying weapons.</span>
It remade Europe after the downfall of French Emperor Napoleon I and tried to restore old boundaries as well as resizing the main powers so they could balance each other and remain at peace.
