B731（Б substantially 731）

Sun, 03 May 2026 04:23:45 +0000

# Unraveling B731 (Б substantially 731): Legacy, Technology, and Cultural Significance Meta Description:
Explore the mysterious and influential legacy of B731—also known as “Б submarines” or “Б substantially 731”—from military history, cryptography, and pop culture. Discover how this enigmatic code has shaped technology, defense, and digital lore. --- ## Introduction: The Enigma of B731