OBJECTIVE This simulation exercise was conducted to test the functionality of the hospital incident command system, triage, treatment areas, and external coordination and communication. METHODS This was an observational study. Coordination, logistic, technical design, staging, and evaluation of the exercise were planned for the exercise. The exercise was conducted in six hospitals. Observations were recorded, and a validated checklist was used to score. METHODS This was a semisurprise exercise in the hospital setup. METHODS Simulated patients and moulage were used for the exercise. METHODS Full-scale simulation exercise. RESULTS Gaps in knowledge and skills were identified in the running incident command center, skills of patient transferal from ambulance to triage area, and external coordination. RESULTS Out of a total score of 220 in the evaluation sheet, the mean score was 161 ± 3.2 (73.2 percent) and the median score was 161.5. CONCLUSIONS Hospital incident command system, triaging, and patient transferal are the areas that can be improved in the future.