The Munich agreement and the Czechoslovakian invasion

The two main reasons for the beginning of the Second World War were: the Munich agreement (which was signed in 1938, between Germany, UK, France and Italy) and the invasion in Czechoslovakia (March 15 1939) by Hitler. Although, I think the most important cause for the beginning of world war two was the invasion in Czechoslovakia. A few years after marching in Rhineland, Hitler's next target was to get Sudetenland into German territory. Since Sudetenland was in Czechoslovakia, …

…this because first he invades half of Czechoslovakia and UK and France accepts to hand it to him. After that he decides he wants it all. So after invading it, when France and UK realize that Hitler wanted to conquer Europe, they begin a new war, which becomes world war two. But I think that if Hitler didn't invade Sudetenland, but directly invaded the whole of Czechoslovakia, maybe world war two still would have occurred.