Answer:
To prevent border violations by border theives and to protect their territory from the Native Americans.
Causes of the war 1812 included British attempt to restrict U.S trade, the Royal Navy's impressment of American seamen an America's desire to expand it's territory. The United States suffered many costly defeats at the hands of the British, Canadian and Native American troops over the course of the war. Including capture and burning of the nation's capital, Washington, D.C in August 1814. The war lasted 2years and 8months
you can find the rest of what your looking for on
https://www.history.com/topics/war-of-1812
I believe that the answer to this question would be when the Parliament confirmed the Act in December 1969
The answer would be December 1969
I am pretty sure it is sent to the president after the legislature