Civilization V Customisation Wiki

The Republic of Sonora led by William Walker is a custom civilization by PorkBean, with contributions from RawSasquatch and others.

This mod requires Brave New World.



The Republic of Sonora was an unrecognized, proclaimed federal republic that existed for a short period in 1853. Established by filibuster William Walker in the western Mexican regions of Baja California and Sonora, the republic was an illegal attempt by Walker to establish a slavery-supporting buffer colony that could eventually accede to the Union, in the same manner as the Republic of Texas. Although the project was popular at home in the United States, supplies were short and resistance by the Mexican military ultimately forced Walker to retreat and the republic to collapse.

William Walker[]

William Walker was a 19th century American filibuster notorious for his various expeditions into Latin and Central America. Walker came to national attention after being challenged to a duel by William Graham Hicks, the editor of the San Francisco Herald, whom he had strongly criticized. Walker was wounded and lost the duel, but gained a platform for his pro-slavery ideals. He began recruiting like-minded supporters of the Manifest Destiny doctrine, and in October 1853 marched with fewer than 50 men into Mexico to establish the Republic of Sonora. His later ventures would include expeditions to Central America, briefly becoming President of Nicaragua before eventually meeting his fate at the hands of the Honduran authorities.

Dawn of Man[]

None moreso than you, President William Walker - doctor, lawyer and soldier of fortune - embodies the spirit of Manifest Destiny. A charismatic leader, you brought 45 of your followers into the Mexican territory of Baja California, invading and successfully capturing the regional capital of La Paz. There you proclaimed the Republic of Sonora, a land fit to serve as a fortified frontier against the marauding natives. Though ultimately you were driven out by the Mexican army, your determination to expand the American South would fuel later adventures in Nicaragua.

Scene Walker

Leaderscene by RawSasquatch

Rally your men, General Walker, for the free and open lands of your neighbors call to you once more. Can you again etch your name into the annals of history? Can you build a civilization that will stand the test of time?

Introduction: Howdy. William Walker, filibuster. We're looking for good folks for our expedition south, if you're interested.

Introduction: Welcome to the Republic of Sonora and Lower California, two new shining stars of the South. I'm William Walker.

Defeat: All right, boys, drop me off in New York and that'll be just fine. Where are we going? Honduras?

Defeat: Looks like the world wasn't big enough for the both of us.

Unique Attributes[]

Sonora (William Walker)
Walker Icon

Art by PorkBean

Grey-Eyed Man of Destiny

Units gain extra Moves Movement and Strength Combat Strength near enemy Cities, decreasing for each Citizen Citizen in the City. Settling Cities always claims the surrounding tiles, even if they belong to another Civilization.

Filibuster Icon

Art by PorkBean

Filibuster (Landsknecht)
  • Much higher Strength Combat Strength
  • May be trained with Production Production
  • Unlocks at Rifling
  • Does not require the Mercenary Army Policy
  • Heals fully 1 turn after entering enemy territory
Bonds Office Icon

Art by PorkBean

Bonds Office (Courthouse)
  • 5 Gold Gold for each tile gained at the end of a war
City List
  1. La Paz
  2. Cabo San Lucas
  3. Ensenada
  4. Hermosillo
  5. Mulegé
  6. Loreto
  7. San José del Cabo
  8. Guayamas
  9. Tia Juana
  10. Rosario
  11. Tecate
  12. Purisima
  13. Miraflores
  14. San Bartolo
  15. Los Aripes
  16. San Luis
  17. Magdalena
  18. San Ignacio
  19. Guadalupe
  20. San Vincente
  21. Ures
  22. Arizpe
  23. San Quintin
  24. Alamos
  25. Sahuaripa
  26. Altar
  27. Opozura
  28. Quepo
  29. Jesus Maria
  30. Santa Cruz
Spy List
  • Henry P. Watkins
  • Charles F. Henningsen
  • Frederick T. Ward
  • Henry A. Crabb
  • Birkett D. Fry
  • Collier C. Hornsby
  • Callender I. Fayssoux
  • Timothy Crocker
  • Achilles Kewen
  • Byron Cole


Sonora Icon


Peace Theme War Theme

Muertos Rojos (The Gunslinger's Lament) - Red Dead Redemption Soundtrack


Horseplay - Red Dead Redemption Soundtrack

"Muertos Rojos" by Bill Elm and Woody Jackson for the soundtrack of Red Dead Redemption "Horseplay" by Bill Elm and Woody Jackson for the soundtrack of Red Dead Redemption

Mod Support[]

Mod Support
Community Balance Patch
Ethnic Units
Map Labels
Unique Cultural Influence

Full Credits List[]

Steam Workshop
Latest Version: v 4
Last Updated: 03 OCtober 2023


  • PorkBean: Author
  • RawSasquatch: Leaderscene, Dawn of Man, Map
  • DuskJockey: Civ icon

Notes and References[]

PorkBean's Rebellions and Failed States [edit]
Main Series
EzoFormosaHeavenly KingdomIonian IslandsLanfangLibertatiaMuskogeeNegrosPalmaresRifSonora
Sengoku Jidai Series
IgaThe Ikko-ikkiImagawaMoriShimazuSo
Other Civs
Dal RiataThe JomsvikingsRutheniaThe SelkupsSuluUnited Fruit CompanyThe Zunbils
April Fools
ElbaJan Mayen
See also: Ambition