Ford Model T and the Production line/conveyer belt
Im not sure but I think it was the beginning of modern warfare.
Thomas Jefferson's presidency had an enormous affect on America's national identity. One of the biggest contributions made by Jefferson was his focus on limiting the size and scope of the federal government. Minimizing the power of the federal government is one trend that other presidents do follow and continue to follow to this day.
The War of 1812 also shaped America's national identity. This war against the British resulted in the US showing their military strength/determination by holding off the British from taking back control of America. This also was the first military conflict against a country after the creation of the US Constitution. This helps to develop the idea that America will be a country that stands up against nations who they feel are threatening our way of life.
