added fields

frontend/WebSem/app/translations/en.json

         "capital": "Capital",
         "language": "Language",
         "area": "Area",
-        "population": "Population"
+        "population": "Population",
+        "name": "Name",
+        "date": "Date",
+        "combatant": "Combatants",
+        "commander": "Commanders"
       }
     },
     "deleteOne": "Do you really want to delete article '{text}'?",