Which instrument wasn't originally used in mariachi music but was added due to popularity?

The Trumpet was not originally part of traditional Mariachi Music but was introduced in the early 20th century as the genre gained popularity. Initially, mariachi ensembles primarily featured violins, Guitars, and vihuelas, but the trumpet's bright and powerful sound complemented the existing instruments, enhancing the overall performance. Its incorporation helped to modernize mariachi and expand its appeal, contributing to the genre's evolution.