foreignborn.com/visas_imm/immigrant_visas/marriage/1marriage.htm
If you plan to marry outside of the U.S., you will be interested in applying for an immigrant visa for your new husband or wife (assuming that your new husband or wife wants to come to live in the U.S. permanently), and you should see Green Card for Wife or Husband, Sponsoring a Spouse for USA Permanent Resident Visa.