This paper verifies mechanized battalion defensive capabilities using constructive simulation. The methodology employs the MASA SWORD environment with Monte Carlo replications, randomized A/B testing of Courses of Action, and standardized metrics (MoE, MoP, MoFP, MoS). The results show that ISR quality and C2 latency are decisive for defensive effectiveness, while obstacle system design and logistical throughput significantly influence enemy tempo and operational endurance. The findings support capability assessment, operational planning, and training design. The paper’s value lies in a reproducible, metrics-based framework for battalion-level capability verification.