Here we see a field hospital during World War II.
A field hospital is a large mobile medical unit that temporarily takes care of casualties on-site before they can be safely transported to more permanent hospital facilities. This term is used overwhelmingly with reference to military situations, but may also be used in times of disaster. The concept was inherited from the battlefield (such as the Mobile Army Surgical Hospital or MASH), and is now applied in case of disasters or major accidents, as well as with traditional Military medicine.
This photo reminds us of the need to avoid armed conflict and to arrive at agreement by peaceful means.