Who transform inexperienced troops into an effective military force during world war 1?

What kind os source would a historian use to get a firsthand account of a past event

The theory of mercantilism holds that a nation's economic power comes from a a.enslave people b.become industrial c. willingness to explore d.favorable balance of trade

Imagine that you are putting together a time capsule for future generations. it will be buried and then unearthed in the year 3000. you want to place in it the items you feel best document your life and times. they can be personal items or items that relate to your larger community. name six items you would include. they can be objects, writing, or something in an audio or visual format. what would you include and why? describe each item in one or two sentences mentioning what it is and how it could future generations learn about your life and times.