Why did private landowners need to build armies

Read the paragraph. before the industrial revolution, most goods were made by hand, in peoples’s homes. workers would buy raw materials and complete each step in the process to make a finished product. manufacturing by hand took a long time, and therefore, the prices for finished goods was high. industrialization changed all that. machines took over the manufacturing process. these machines were much more efficient than workers creating items by hand. this meant that many more items could be produced, drastically reducing their price, and making them more affordable for consumers. which would be the best example to use to support the information in this body paragraph?

Why were inventors essential or necessary for an industrial revolution to happen in america

Which would be good historical evidence when studying manifest destiny?