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Did you try it?

<url-pattern>/miami</url-pattern>

The above line indicates the url may be specified a bit differently...try:
/nameofwar/miami

Please post your web.xml

I don't use netbeans, but am guessing by default the url of the servlet is set to root (eg '/Register'), so try accessing the servlet like:
'/nameofwar/Register'
where nameofwar is the name of the...

I assume your Register servlet is in a package named website? Depending upon how you've configured the url in the web.xml, there should be no need to specify the package name (you should however...