Hanuman was a single of those four monkeys. This monkey team was instrumental in supplying Rama crucial information regarding Sita. They helped him establish a bridge throughout the seas, and cross around using a monkey army that correctly stormed the demon stronghold and freed Sita. भस्मसादभवदैत्यो दुष्टचेष्टितमन्तकृत् ॥ २३ ॥ https://www.youtube.com/@AacharyaGoldieMadan/