Do not directly call this template. It is used to support other templates. Once another template decides that the topic of a page is a decade, this template will automatically provide a navigation box.
It is completely automatic, and has no user-definable parameters.
Sample output
Because this template is dependent upon detecting a PAGENAME that is a decade. its output can only be seen on a decade page. It is impossible to reproduce its results here. If you wish to test it, go to any decade and add {{timeline}} to the page.