The rank insignia of a Field Marshal in the British Army comprises two crossed batons on a wreath, with a crown above. In some other countries, historically under the sphere of British influence, an adapted version of the insignia is used for Field Marshals, often with the crown being replaced with an alternative cultural or national emblem.
The office of Marshal was known in England from the 12th century, but in the introduction of the modern military title Great Britain was a relative latecomer. It was introduced by George I, the first King of the House of Hanover, in the style of the continental armies. The 1st Earl of Orkney became the first Field Marshal in 1736.
Now no Field Marshals are to be routinely appointed in peacetime, the last being Field Marshal Lord Inge, although members of the Royal Family and certain other very senior officers are still eligible to be appointed (none has, however, been appointed since the general suspension of promotions to the rank). The rank of Field Marshal is the only rank in the British Army where the individual never officially retires, as the rank is conferred for life.
The Royal Marines do not have an equivalent rank to Field Marshal, although the position of Captain General has the same insignia as an Army Field Marshal.