• Saudi Arabia invests in air defense systems like THAAD and Patriot.
• The kingdom's defense strategy depends on layered protection and surveillance.
• The UAE and Qatar's defense architectures serve as reference points for Saudi Arabia.
• Economic resilience is crucial to Saudi Arabia's ability to sustain operations.

Saudi Arabia's defense investments may indicate a shift towards prioritizing homeland security and economic resilience. The combination of THAAD and Patriot systems suggests a focus on layered defense, which could enhance the kingdom's ability to protect its infrastructure and sustain operations in Yemen. However, the effectiveness of these systems depends on data sharing, command and control, and crew training.