I'd say that, when they proclaimed the Third Imperium as a successor state, they included all the systems of the First & Second Imperiums. While the Third has expanded outside the First's borders into the Marches, I suspect that doesn't make up for not regaining Meshan, Mendam and Umdukan sectors.
On 2018-01-20 00:19, Phil Pugliese (via tml list) wrote:Don't know if I'd count most of the SolConfed worlds amongst the '11,000'.