Learn why Springfield, Massachusetts was selected to be the site for our first national armory. Investigate how the number of workers in the armory impacted the amount of production over time. Objective 1. Survey a familiar location and create a map of the area 2. Critique the accuracy of maps and evaluate its uses. 3. Assess what resources would be needed to build and sustain an armory. 4. Develop an argument about why an armory should be built in a specific location. 5. Graph the amount of armory workers and the production of firearms over time and make hypotheses about the causes for change Duration: 60 Minutes.