The lengthening of the barrel and the transition from muskets to rifles.<span> The longer barrel helped with accuracy. With rifles, the US could fire at the British from a safe distance and with accuracy.</span>
Yamamoto’s primary objective at Pearl Harbor was demolish as much of the American fleet as possible, since the Japanese thought that the US getting involved in World War II was inevitable and wanted to strike first.
Iit protects against any branch of the government trying to abuse its power. This way all powers are shared and equal. This goes even for the president, he alone cannot mandate orders. It takes approval of branches (judicial, legislative, executive) to get to a deal. :)
Happy New Year!