Translation of hummingbird in German

We wanted to take a hot shower but there was no hot water at all. We asked someone to fix it and he showed us that there was a heating switch outside the bathroom which would turn on the boiler.
In the end of the day we went to visit the Vietnam war museum. It is actually called the American war museum. It gives the Western visitors a different point of view of the events forty years ago.
Thanks a lot for the correction, they are very helpful and so are you in general. As I mentioned earlier I need more practice to write entire sentences in French and it takes a lot of time.