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:
NS Gandpracticenade. German infantrymen practice building clearance drills as their counterparts observe Ustka Poland June German Army rifleman uses dummy grenade to assault room during glasshouse training glass house is an imaginary house outlined with tape and enables fire teams to be closely monitored on their tactical skills