This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Us costal defense . en US Coastal Defense illustration Our Country in War by Murat Halstead Murat Halstead PDUS PDold Original upload log en Uscostaldefense bytes Billwhittaker no US Costal Defense illustration Our Country in War by Murat Halstead Murat Halstead Public Domain Coastal artillery in the United States