The Galactic Empire: An Empire Reborn
Imperial Officers' Manual
Major Revision: 2.0 – 2008.10.31
An adaptation of the pre–Endor document and policies.
cylinders  RIP  cylinders
... An Field Marshal's Rank Insignia ...

The rank of Field Marshal (FM) has been officially discontinued ... Even during pre-Endor times when the Empire was at its height, the rank was largely unused. This rank is almost entirely akin to the Imperial Army form of the Imperial Navy's High Admiral rank.

Traditionally, a Field Marshal would oversee the sum total of ground operations in a single sector of space... However -- as overseeing military & political operations in a single sector of space was the standard purview of a Moff -- this rank did not exist unless a Moff specifically appointed a Field Marshal to deal with the Moff's ground responsibilities.

As with the awarding of the rank of High Admiral, this practice was outlawed by Grand Admiral Daemon after a serious re–evaluation of the role of the Council of Moffs in the modern Empire, and in recognition of the fact that many worlds of the Empire are being safeguarded by only a fraction of the troops that would have been available at its height...