There was once a king who wants to expand his kingdom so badly. And he focused his attention to his neighboring kingdoms. So, he summoned his greatest generals to seek advice. He sent his son to other places to pick up war strategies and other valuable information. He sent scouts to the nearby kingdoms to study their strengths and weaknesses.
After a few years, he was able to devise a perfect plan. But in order to execute the plan, he has to find the right place to wage the war, he has to have the right army size composed of skillful and courageous warriors, he has to have the right weapons & horses and the weather has to be ideal.
He wasted no time in building his army - recruiting and training warriors. He spent a fortune in manufacturing the weapons and breeding the best horses. He sent some of his men to study the weather to be able to predict a favorable time to wage war.