Are there any cyber defense magazines that focus on military cyber threats and security best practices?

Yes — there are several magazines and publications that regularly cover military cyber threats, national security, and cyber defense best practices. A few good options:

1. C4ISRNET

• Focuses on defense tech, cyber warfare, military networks, and secure communications.
• Strong on how cyber impacts command, control, communications, computers, intelligence, surveillance, and reconnaissance.
• Good if you want coverage tied closely to the U.S. military and defense contractors.

2. Defense One

• Covers national security, military technology, and cyber strategy.
• Frequently publishes on cyber threats to military and government systems.
• Useful for policy, threat analysis, and defense-sector security trends.

3. Breaking Defense

• Defense-industry publication with substantial cyber coverage.
• Often discusses cyber operations, military modernization, and cyber resilience.
• Good mix of operational and strategic viewpoints.

4. SIGNAL Magazine

• Published by AFCEA, it focuses on military communications, IT, cybersecurity, and information warfare.
• Very relevant to defense cybersecurity and secure systems.
• Strong on practical best practices and defense IT modernization.

5. Military Embedded Systems

• More technical, but covers defense electronics, secure systems, and cyber protection for military platforms.
• Useful if you’re interested in embedded security and weapon/platform resilience.

6. Cyber Defense Magazine

• Broader cybersecurity magazine, but it includes defense-oriented content, threat intelligence, and security best practices.
• Less military-specific than the others, but still relevant.

7. Merrick / AFCEA-related publications and journals

• AFCEA often publishes material on cyber defense, military networks, and secure communications.
• Good source for practitioner-focused defense cybersecurity content.

If you want, I can also give you:

• a shortlist of the best 3 for military-specific cyber threats
• print vs. online-only options
• or publications focused on NATO/U.S./international defense cyber issues