Uncanny X-Men #263 (1990) (High Grade)

Forge, Jean Grey, and Banshee navigate the perilous Morlock Tunnels to rescue their abducted friends, Piotr and Callisto, while confronting their own inner demons. Amidst flashbacks to Forge's past in Vietnam and moments of revelation, they devise a risky plan to outsmart their assailant, Masque.