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 ad a document the hardships of the civil war, but its purpose has also become to commemorate the civil war so that we ca remember the people who suffered and the reasons why the war occurred.

Explanation:

dc was afraid of these new companies because they may take their customers away due to them being more better or something else.