With the ability to forge iron tools, farming tools were more effective and provided a greater production and effectiveness. More food produced means that more people are able to be fed and consequently establish and work in the land. With a higher population and food cap, West Africa settlements were able to grow.
Automotive was a huge development in 1950s and was important because it was a area we were slacking on.
The third amendment is known as a protection from intrusions or invasions. specifically the British had issues with their soldiers barging into homes and demanding hospitality and resources. This was known as the Quartering Act. The third amendment doesn’t allow soldiers to do this in America as a way to ensure privacy.