My Peruvian Girlfriend

In this circumstance, the U.S. citizen marries the foreign fiance (either in the foreign fiance's country, in the US, or in a third country...the location does not matter as long as it is a legal marriage) and applies DIRECTLY through the foreign U.S. consulate for the spousal visa.
U.S. consulates typically will only do this for US citizens who are residents, however if you do qualify, it can be the quickest route, depending on their wait time for the interview. Contact your respective Consulate to determine if this option is valid.

The foreign spouse can work upon entering the US and obtaining a social security card, in usually 1-2 weeks. The foreign spouse will not need advance parole to travel outside of the U.S..
• the quickest route to admission to the US and to a resident status in the US, based on marriage, usually taking 3 months or less.

• The foreign spouse is allowed to work as soon as he/she can get a social security card, about 1-2 weeks.

• Wait times for the visa can be one week to 3 months, which is still faster than even the fiance or traditional spouse visa! • Interested persons should be sure to check on the marriage requirements in the country where they plan to marry, as some of these are time-consuming and/or expensive.

• Consular policies can change over time, and one should always confirm with the consulate that they will do this process