What does the above photograph commemorate and document?

This is a picture entitled, the Ruin’s of Gallego Flour Mills, Richmond. It records an event and exists as an allegory of the costs of the Civil War. This was created as a document the hardships of the Civil War, but its purpose has also become to commemorate the Civil War so that we can remember the people who suffered and the reasons why the war occurred.

Explanation:

by acting roughly or something dramatic happening in the story.