What were the first concentration camps like? What were they used for?

The first concentration camp, Dachau, opened off Munich, Germany in March 1933. It was primarily used for political prisoners and was the longest operating camp in existence, until its liberation in April 1945. During the Third Reich century, Nazi officials built over 44,000 sites of incarceration.

some american cities felt workers were being oppressed by business monopolies

the alfred thayer mahan award for literary achievement is awarded each year by the navy league of the united states. the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation. presented since 1957, "this award for literary achievement is awarded to a u.s. navy officer, u.s. marine corps officer, enlisted service member, or civilian who has made a notable literary contribution that has advanced the knowledge of the importance of sea power in the united states."[1]