How do I get a visa if I want to travel to Europe on the basis of reciprocity in the United States?

You have an American visa and no American passport, so you must apply for a new visa to travel in Europe. First of all, you need to find out which country you have stayed in the longest, so you need to apply for a visa for this country. For example, if you have been in Germany for the longest time, you should go to official website, the German Consulate in the United States, see clearly the documents and procedures required for a visa, and then prepare and apply according to the requirements of the website.