Field marshal

Field marshal (or field-marshal, abbreviated as FM) is the most senior military rank, senior to the general officer ranks.

Promotion to the rank of field marshal in many countries historically required extraordinary military achievement by a general (a wartime victory). However, the rank has also been used as a divisional command rank and as a brigade command rank.

Historically, in some countries the rank of generalissimo was regarded as a rank superior to field marshal, but has mostly fallen out of use and no currently living holders exist.