The question was asked, “Why 432?”
This number is for Cambrai and comes from a number of sources including the book in the last blog, Tank Action in the Great War by Ian Verrinder.
The nine battalions included:
324 Fighting Tanks
36 Wire pullers
18 Supply (Mk IV Females)
5 Gun Carriers
With each battalion including:
36 fighting tanks (12 per company in 4 sections)
6 spare tanks (2 per company)
6 supply tanks (2 per company)
The sections at Cambrai normally had 3 tanks, 2 Females and a Male.
These numbers were fleeting as on the second day there were only 60 tanks available and at no time were there more than 87 tanks available.