Economic indicators are statistical methodologies that aim to represent economic activity in a quantitative and direct way. It is a form of analysis designed to measure the evolution of an economy over time. The main economic indicator is GDP.
GDP is the way to measure the wealth of a country by calculating the output of final goods and services of an economy in a given period, usually one year. In the GDP equation, government investments and expenditures are also considered. The higher the GDP of a country, the better its performance in the world economy.
Most of the battle sites were located near water, including rivers, lakes, or ocean. American and British armies traveled by boat, so battles occurred near the bodies of water they were traveling on.
He founded the meatpacking company "Armour and Company" in Chicago in 1867, which matches the American businessman and 19th century parts of your question. I hope this helps!