Who's under attack?

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Across
  1. 1. Home of one of Earth's oldest colonies a mere 25ly from Sol
  2. 4. Home to two intelligent species that enter into a symbiotic relationship sparingly
  3. 5. One of only a few systems that produces Zenite
  4. 7. The inhabitants of this system recently appealed to the Federation for protectorate status to protect themselves from the Romulan Free State
  5. 8. This system suffered a brutal occupation during the Federation/Klingon War
  6. 10. Kahless the Unforgettable promised to return from Sto-vo-kor here
  7. 11. Home to the Klingon Empire's greatest shipyards
  8. 16. The loss of the USS Enterprise-C here paved peaceful path forward for the Federation and Klingon Empire
  9. 17. One of the most famous and notable pleasure planets of the Federation
  10. 18. Original an Earth colony, this system was captured by the Romulans during the Earth-Romulan War and is now part of the Free State
  11. 19. A capitalist haven between the Federation and Romulan Free State
  12. 20. USS Defiant was destroyed in this system.
  13. 21. Home to the Cardassian Twelth Order
Down
  1. 1. This system shares its name with the Roman god of the forge
  2. 2. The closest system to Sol
  3. 3. Named after the first captain of the SS Enterprise
  4. 6. The School for Diplomacy and Candor can be found here
  5. 7. Bordering Kzinti space, this system is home to the M'Yengh shipyards
  6. 9. A dilithium rich core world that joined the Federation late due to mistrust of certain founding species
  7. 12. Home system to the species that gives its name over to the longest-lived criminal syndicate in the galaxy
  8. 13. This system was a core world occupied during the Dominion War
  9. 14. This system is still defended by the Imperial Guard
  10. 15. The Romulan Republic relies on this system to support its navy and trade