Field marshal is the rank after the top grade of colonel and you have to earn credits to rank up.
In some militaries, Field Marshall is the highest rank - basically equivalent to the highest ranking General of militaries which don't have the rank. They're basically top dog in that military.
General
Field Marshal is the highest military rank in Pakistan Army.
Rommel earned the rank of Field Marshal in the Battle of Gazala.
In most structured armies it is the rank of 'Field Marshal'.
No, Field Marshall is the highest rank in the army. Even very few get promoted to this.
The rank of Field Marshall is not used in the American Military in any branch.
If you meant the highest rank, the Military is divided into three divisions, each with their own highest rank:Navies Admiral of the Fleet Armies Field Marshal Air forces Marshal of the Air Force
Field-Marshal is an army rank above general. Field-Marshal Bernard Law Montgomery KG GCB DSO PC, usually called "Monty", and who was made Viscount Montgomery of Alamein held the rank of Field-Marshal during the second war. And so did Viscount Gort, Sir Archbold Wavell, Sir Alan Brook, Sir Harold Alexander and Sir Henry Wilson amongst others.
The highest rank attainable in the British Army is that of Field Marshal. There are currently seven living Field Marshals, the most senior is Baron Richard Vincent of Coleshill of the Royal Artillery.
There is no rank of Marshal