The historical event that is probably responsible for the first paid social work-type position in the united states is

The American Civil War is the correct answer.

The American Civil War was responsible for the first paid social work-type position in the United States. After the Civil War, the country was found in deep social and economic crisis. Therefore, there was the need of social programs and organizations to help millions of people facing drastic social and economic hardship. These first social workers were found working in the Special Relief Department of the U.S Sanitary Comission.

when the united states took over