20

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Across
  1. 4. Russian sub
  2. 6. Russian tank
  3. 7. US main battle tank
  4. 9. Russian attack heli
  5. 11. US tank
  6. 15. Missile defense
  7. 17. German tank
  8. 20. Antitank missile
Down
  1. 1. Swedish tank
  2. 2. Missile system
  3. 3. Attack helicopter
  4. 5. Antitank weapon
  5. 8. Russian jet
  6. 10. Light tank
  7. 12. Antiair tank
  8. 13. US main battle tank
  9. 14. Russian gunship
  10. 16. Soviet WWII tank
  11. 18. WWII German tank
  12. 19. Russian fighter