In the THAAD engagement sequence, which step directly precedes Engage?

• A. Threat Evaluation & Weapons Assignment
• B. Track/Identify
• C. Detect
• D. Surveil

Answer: (A)

In this engagement sequence, you move from sensing a possible threat to taking action. Surveil starts the process by broad monitoring, Detect flags potential targets, and Track/Identify locks onto the track and confirms identity. Only after confirming there is a viable threat and selecting the appropriate weapon is made in Threat Evaluation & Weapons Assignment, which then authorizes and assigns the interceptor. Once that authorization and allocation are in place, Engage is carried out to fire the interceptor. So the step that directly precedes Engage is Threat Evaluation & Weapons Assignment, because it provides the final threat validation and weapon authorization needed before launching. Surveil and Detect occur earlier in the sequence, and Track/Identify happens before the threat evaluation, so they don’t directly precede Engage.