Configuring POM for Tomcat

OK, there must be an easier way to do this...

I am trying to figure out how to configure my POM to depend on tomcat,
without creating dependencies on each individual tomcat jar file.

After googling around for answers, I cannot seem to find any simple way
to set up my web app so that right dependencies are defined (i.e.
HttpServlet)

Can anyone point me to some simple guide on how this is done?

Cheers, Eric