In short can you tell me the date acquired of Original United States and circumstances of acquisition?

Answer 1

Not sure what you mean.

The original 13 States declared independece from Great Britian on July 4th 1776.

While the Declaration Indpendence was a huge step forward in political philosophy, it didn't mean a whole lot on the ground until Washington forced Lord Cornwallis to surrender at Yorktown in 1781.

Britian officially recognized American Independence at the Treaty of Paris in 1783.
http://en.wikipedia.org/wiki/Treaty_of_Paris_(1783)

The US tried a "Confederation" for a few years, and it just didn't work out. Democracy is hard, but at least in those days we didn't have CNN telling us that it was a disaster and would never work, yada, yada, yada...... It went on like this for several years, but it was such a mess they called a Constitutional Convention, and (in secret, try that today!) wrote the U.S. Constitution.

Different states ratified the Constitution on different dates. You can find a list here. http://en.wikipedia.org/wiki/US_Constitution