Reference

"The Front Line" won several awards at the 20th Buil Film Awards. According to the search results, the film received the following accolades:

1. Best Film: "The Front Line" was recognized as the Best Film of the event.
2. Best Director: The director of "The Front Line," Jang Hoon, was awarded for his work.
3. Best Music: The film's music also stood out, earning the award for Best Music.
4. Best Actor and Best Actress: Ryu Seung Bum and Jung Yoo Mi were honored with the Best Actor and Best Actress awards, respectively.

These awards highlight the film's success and the recognition it received in various categories at the 20th Buil Film Awards. For more detailed information, you can refer to the Wikipedia page on the Buil Film Awards.