diff --git a/src/main/java/mops/gruppen2/entities/Gruppe.java b/src/main/java/mops/gruppen2/entities/Gruppe.java
index 6b3ddf9..c0f1d12 100644
--- a/src/main/java/mops/gruppen2/entities/Gruppe.java
+++ b/src/main/java/mops/gruppen2/entities/Gruppe.java
@@ -5,6 +5,7 @@ import mops.gruppen2.events.AddUser;
 import mops.gruppen2.events.CreateGroupEvent;
 import mops.gruppen2.events.UpdateGroupDescriptionEvent;
 import mops.gruppen2.events.UpdateGroupTitleEvent;
+import mops.gruppen2.events.DeleteUserEvent;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -40,5 +41,15 @@ public class Gruppe extends Aggregat {
 
 	public void applyEvent(UpdateGroupDescriptionEvent event) {
 		this.beschreibung = event.getBeschreibung();
+		this.teilnehmersList = new ArrayList<>();
+	}
+
+	public void applyEvent(DeleteUserEvent event) {
+		for (Teilnehmer teilnehmer: teilnehmersList) {
+			if (teilnehmer.getId().equals(event.getUser_id())) {
+				this.teilnehmersList.remove(teilnehmer);
+				break;
+			}
+		}
 	}
 }
diff --git a/src/main/java/mops/gruppen2/events/DeleteUserEvent.java b/src/main/java/mops/gruppen2/events/DeleteUserEvent.java
new file mode 100644
index 0000000..2b925a2
--- /dev/null
+++ b/src/main/java/mops/gruppen2/events/DeleteUserEvent.java
@@ -0,0 +1,11 @@
+package mops.gruppen2.events;
+
+import lombok.Getter;
+
+@Getter
+public class DeleteUserEvent extends Event{
+
+    public DeleteUserEvent(long id, long gruppe_id, long user_id) {
+        super(id, gruppe_id, user_id);
+    }
+}
diff --git a/src/main/java/mops/gruppen2/services/GruppenService.java b/src/main/java/mops/gruppen2/services/GruppenService.java
index bf5ac67..40e6a56 100644
--- a/src/main/java/mops/gruppen2/services/GruppenService.java
+++ b/src/main/java/mops/gruppen2/services/GruppenService.java
@@ -2,6 +2,7 @@ package mops.gruppen2.services;
 
 import mops.gruppen2.events.AddUser;
 import mops.gruppen2.events.CreateGroupEvent;
+import mops.gruppen2.events.DeleteUserEvent;
 import mops.gruppen2.events.Event;
 import mops.gruppen2.entities.Gruppe;
 import org.springframework.stereotype.Service;
@@ -14,13 +15,14 @@ public class GruppenService {
 
 	CreateGroupEvent createGroupEvent = new CreateGroupEvent(1L,1L,1L,"hello", "foo");
 	AddUser addUser = new AddUser(1L, 1L, 1L, "jens","bendiest","jb@gmail.ru");
+	DeleteUserEvent deleteUserEvent = new DeleteUserEvent(1L, 1L, 1L);
 
 	public GruppenService(){
 		List<Event> eventList = new ArrayList<>();
 		eventList.add(createGroupEvent);
 		eventList.add(addUser);
+		eventList.add(deleteUserEvent);
 		Gruppe newGroup = buildGroup(eventList);
-		System.out.println(newGroup.toString());
 	}
 
 	Gruppe buildGroup(List<Event> eventList){