It's a because during the middle ages kingdoms conquer other nations by the numbers as soon as the child has education he (I say he because they didn't allow women to have education back then) he will enlist into one of the European nations and fight.
I think the answer is Lai massacre
In 1609, two years after English settlers established the colony of Jamestown in Virginia, the Dutch East India Company hired English sailor Henry Hudson to find a northeast passage to India. After unsuccessfully searching for a route above Norway, Hudson turned his ship west and sailed across the Atlantic. Hudson hoped to discover a "northwest passage," that would allow a ship to cross the entirety of the North American continent and gain access to the Pacific Ocean, and from there, India. After arriving off the coast of Cape Cod, Hudson eventually sailed into the mouth of a large river, today called the Hudson River. Making his way as far as present-day Albany before the river became too shallow for his ship to continue north, Hudson returned to Europe and claimed the entire Hudson River Valley for his Dutch employers.
The correct answer is tax return.
Tax returns are filled out by millions of Americans on a yearly basis. This form allows the government to understand your work history, the wages you earned during the fiscal year, and how much you paid in taxes. This will allow the government to assess whether you paid too much or too little in taxes. If you paid too much, you will get a refund. If you paid too little, you are responsible for sending the government the difference that you owe.
