Answer:
Several reasons: military and technological superiority, better military and administrative organization, an industrial economy backing military capacity, one that was poised and able to benefit from the conquest and colonization of new lands rich in raw materials; the need to access to raw materials and open new markets.
Explanation:
The phrase which explains what was significant about the Declaration of Independence was that it set up a government system without any leaders. This was sort of a system of emancipation from the British government for the thirteen colonies and this document essentially made the United States free from the rule of the British monarchy.