Before the movie's even started properly. Sam takes a long, dramatic walk to the debriefing chamber, escorted by guards and accompanied by tense music every step of the way...including the part where they have to struggle with a malfunctioning gate and then get lost in the corridors and have to backtrack. The music never changes.
When Sam first arrives at the Espada Ardiente camp, one of the farmer-soldiers in the foreground is seen maintaining a muzzle-loading weapon. While Beatriz is trying to convince Sam that they're not as poorly-armed as they seem.
Sam tumbles out of the jungle after being "kidnapped" — one of the soldiers in the scouting party radios back to base with, "(subtitled) We found the white guy!"