The Soviet Cosmonaut Training Centre had the code name Military Unit 26266 and was also known by the initials TsPK (Tsentr Podgotovki Kosmonavtov).
Notes on verification
Corroborated by official GCTC website, Russian and English Wikipedia, and secondary sourcing referencing Burgess & Hall's historical account. Multiple independent sources converge on both the military unit designation and TsPK acronym. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.75 clusters=2 claim_tier=notable | framework convergence=partial (upstreams: Official GCTC (Gagarin Cosmonaut Training Center) historical records, Burgess & Hall, 'The First Soviet Cosmonaut Team: Their Lives and Legacies') — publishers independent, evidence may not be | kind=empirical eligibility=high]
Sources
- How Yuri Gagarin Was Picked to Be First in Space (seed:firsts_and_inventions)
- http://www.gctc.su/main.php?id=242 (corroboration)
- https://military-history.fandom.com/wiki/Yuri_Gagarin_Cosmonaut_Training_Center (corroboration)