Edo expanded rapidly to accommodate Ieyasu's 80,000 retainers and their families and the myriad common people who served their daily needs.
Edo had to expand rapidly due to war victims needing refuge.
mnli hypothesis: Edo had to expand rapidly due to war victims needing refuge. premise: Edo expanded rapidly to accommodate Ieyasu's 80,000 retainers and their families and the myriad common people who served their daily needs.