The Army Corps of Engineers operates in both the military and civilian realms, whether dredging bases to maintain warship access to bases or looking after the health of dams and levees that protect cities. Its information needs match the diversity of its missions.
If you find a dimension intereseting, we recommend you pick up one or two facts that you find intriguing and place them into your memory. That way you will have 2nd degree information about the topic if it comes up in conversation.
Accordingly, you can do the same with others as well.