Asherian Command wrote:
Reminder : I wrote that three to four years ago. Having done the math again, coming at your number, I realized you had not included thunder hawk pilots (2 per thunder hawks) and space commanders on naval vessels (Theorized)
It would not be impossible to think that the thunder hawks are not manned by the reserve companies as they would probably be dedicated to the position.
I am pretty sure I did add the thunderhawks and space commanders, but I'll double check it.
Of course, the number of 1000 is only in relation to line company Astartes. It never applied to Neophytes or any space marine not a permanent of a Veteran, Battle, Reserve or Scout company.