A nation is basically a collection of towns, which all generally help each other out in terms of resources, manpower, advice, and other things (Of course, that's not required within a nation, but it seems to be common, at least on noobstown). To see if you happen to be in a nation type "/town", without the quotes, in the chat and if your town, Jazz in this case, is part of a nation, there will be a line in the text that comes up that says something like "Nation: nationNameHere". If you do happen to be in a nation, and you want to know a little bit about your nation, simply type in "/nation". Also, if you are in a nation, you can switch into, and out of, nation chat in a similar manner as to town chat with "/nc".