To get your foreign bride to the USA, you should file for a K1 fiance visa. It will allow your wife to travel back to the U.S. with you, marry you, and then file for a Marriage Green Card for a future residence together. The U.S. Immigration law requires supporting documents and evidence that your foreign bride is an actual romantic partner of yours. You should visit your partner at least once in the past two years before applying for a K1 visa. Then, time-stamped pictures of you, your bride, and her family/friends are also needed for evidence.