diff --git a/migrations/20230609121618_initial.sql b/migrations/20230609121618_initial.sql
index d3b434cf..4c6c2baf 100644
--- a/migrations/20230609121618_initial.sql
+++ b/migrations/20230609121618_initial.sql
@@ -55,13 +55,13 @@ CREATE TABLE event
     canceled                BOOLEAN         NOT NULL DEFAULT false
 );
 
-CREATE TABLE assignement
+CREATE TABLE assignment
 (
     eventId                 INTEGER         REFERENCES event (id),
     availabillityId         INTEGER         REFERENCES availabillity (id),
     function                function        NOT NULL,
-    startTime               TIME,
-    endTime                 TIME,
+    startTime               TIME            NOT NULL,
+    endTime                 TIME            NOT NULL,
     PRIMARY KEY (eventId, availabillityId)
 );
 
diff --git a/src/endpoints/assignment/post_new.rs b/src/endpoints/assignment/post_new.rs
index 3102676d..8aebe1f9 100644
--- a/src/endpoints/assignment/post_new.rs
+++ b/src/endpoints/assignment/post_new.rs
@@ -2,8 +2,11 @@ use actix_web::{web, HttpResponse, Responder};
 use serde::Deserialize;
 use sqlx::PgPool;
 
+use crate::models::{Assignment, Event, Function};
+
 #[derive(Deserialize)]
 pub struct NewAssignmentsForm {
+    event: i32,
     wachhabender: Option<i32>,
     posten: Vec<i32>
 }
@@ -11,5 +14,41 @@ pub struct NewAssignmentsForm {
 #[actix_web::post("/assignments/new")]
 pub async fn post(pool: web::Data<PgPool>, form: web::Form<NewAssignmentsForm>) -> impl Responder {
 
+    let event = Event::read_by_id_including_location(&pool, form.event).await.unwrap(); // TODO: Check if location is needed
+
+    if event.voluntary_wachhabender && form.wachhabender.is_some() && form.posten.contains(&form.wachhabender.unwrap()) {
+        return HttpResponse::BadRequest().body("Wachhabender kann nicht zugleich Posten sein!");
+    }
+
+    let mut joined_ids = form.posten.clone();
+    if let Some(id) = form.wachhabender {
+        joined_ids.push(id);
+    }
+
+    for availabillity_id in joined_ids {
+        let assignments = Assignment::read_by_availabillity(pool.get_ref(), availabillity_id).await.unwrap();
+
+        let mut can_be_used = true;
+
+        for assignment in assignments {
+            if event.start_time >= assignment.start_time && event.start_time <= assignment.end_time {
+                can_be_used = false;
+                break;
+            }
+        }
+
+        if !can_be_used {
+            return HttpResponse::BadRequest().body("availabillity time slot bereits genutzt!");
+        }
+    }
+
+    if let Some(id) = form.wachhabender {
+        Assignment::create(pool.get_ref(), id, event.id, Function::Wachhabender, event.start_time, event.end_time).await.unwrap();
+    }
+
+    for id in &form.posten {
+        Assignment::create(pool.get_ref(), *id, event.id, Function::Posten, event.start_time, event.end_time).await.unwrap();
+    }
+
     HttpResponse::Ok().finish()
 }
diff --git a/src/models/assignement.rs b/src/models/assignement.rs
index 91c129d4..a4ce9961 100644
--- a/src/models/assignement.rs
+++ b/src/models/assignement.rs
@@ -1,5 +1,5 @@
 use chrono::NaiveTime;
-use sqlx::PgPool;
+use sqlx::{query, PgPool};
 
 use super::Function;
 
@@ -8,12 +8,66 @@ pub struct Assignment {
     pub availabillity_id: i32,
     pub function: Function,
     pub start_time: NaiveTime,
-    pub end_time: NaiveTime
+    pub end_time: NaiveTime,
 }
 
 impl Assignment {
-    pub async fn create(pool: &PgPool) -> anyhow::Result<i32> {
+    pub async fn create(
+        pool: &PgPool,
+        availabillity_id: i32,
+        event_id: i32,
+        function: Function,
+        start_time: NaiveTime,
+        end_time: NaiveTime,
+    ) -> anyhow::Result<()> {
+        query!(
+            r##"
+                INSERT INTO assignment (eventId, availabillityId, function, startTime, endTime)
+                VALUES ($1, $2, $3, $4, $5);
+            "##,
+            availabillity_id,
+            event_id,
+            function as Function,
+            start_time,
+            end_time
+        )
+        .execute(pool)
+        .await?;
 
-        Ok(0)
+        Ok(())
+    }
+
+    pub async fn read_by_availabillity(
+        pool: &PgPool,
+        availabillity_id: i32,
+    ) -> anyhow::Result<Vec<Assignment>> {
+        let records = query!(
+            r##"
+                SELECT 
+                    assignment.eventId,
+                    assignment.availabillityId,
+                    assignment.function AS "function: Function",
+                    assignment.startTime,
+                    assignment.endTime
+                FROM assignment
+                WHERE assignment.AvailabillityId = $1;
+            "##,
+            availabillity_id
+        )
+        .fetch_all(pool)
+        .await?;
+
+        let assignemnets = records
+            .iter()
+            .map(|r| Assignment {
+                event_id: r.eventid,
+                availabillity_id: r.availabillityid,
+                function: r.function,
+                start_time: r.starttime,
+                end_time: r.endtime,
+            })
+            .collect();
+
+        Ok(assignemnets)
     }
 }
diff --git a/src/models/availabillity.rs b/src/models/availabillity.rs
index 2b4d9c9c..67e56c7a 100644
--- a/src/models/availabillity.rs
+++ b/src/models/availabillity.rs
@@ -139,7 +139,7 @@ impl Availabillity {
                                  user_.lastLogin,
                                  user_.receiveNotifications
                              FROM availabillity
-                             LEFT JOIN assignement ON availabillity.Id = assignement.availabillityId
+                             LEFT JOIN assignment ON availabillity.Id = assignment.availabillityId
                              JOIN user_ ON availabillity.userId = user_.id
                              WHERE availabillity.date = $1;
         "##,
diff --git a/src/models/user.rs b/src/models/user.rs
index 642f0783..1f6b432d 100644
--- a/src/models/user.rs
+++ b/src/models/user.rs
@@ -1,5 +1,5 @@
 use chrono::{DateTime, Utc};
-use sqlx::{Execute, PgPool};
+use sqlx::PgPool;
 
 use super::{Area, Function, Role};
 
diff --git a/templates/assignment/new.html b/templates/assignment/new.html
index aef94601..8c644b24 100644
--- a/templates/assignment/new.html
+++ b/templates/assignment/new.html
@@ -3,7 +3,9 @@
 {% block content %}
 <section class="section">
   <div class="container">
-    <form method="post" action="/users/new">
+    <form method="post" action="/assignments/new">
+      <input type="hidden" name="event" value="{{ event.id }}" />
+
       <h1 class="title">Planung für {{ event.name }}</h1>
       <div class="box">
         {% if event.canceled %}<b>Veranstaltung abgesagt!</b>{% endif %}
@@ -45,6 +47,7 @@
 
       <div class="field">
         <label class="label">Posten</label>
+        <p class="help">Mehrfachauswahl mit Strg+Mausklick</p>
         <div class="select is-multiple">
           <select name="posten" multiple size="{{ available_posten.len() }}">
             {% for a in available_posten %}
@@ -79,6 +82,20 @@
         </div>
       </div>
 
+      <div class="field is-horizontal">
+	<div class="field-label"></div>
+	<div class="field-body">
+	  <div class="field is-grouped">
+	    <div class="control">
+	      <input class="button is-link" type="submit" value="Erstellen">
+	    </div>
+	    <div class="control">
+	      <a class="button is-link is-light" href="/">Zurück</a>
+	    </div>
+	  </div>
+	</div>
+      </div>
+
     </form>
   </div>
 </section>