Over the course of the existence of the Indian Army, the designations and numberings of it's various regiments have undergone several changes. Indeed much of this has been very confusing for a layman who would like to know more on the Indian Army's rich regimental history. As a result of the expansion of the Army, several new regiments have been raised since Independence. In the Infantry, all regiments except the old ones whose 10th Battalion came to be known as Regimental Center, can use the number 10 for new raisings which are also serially numbered. Another restriction that applies to Infantry Regiments whose battalions have been transferred to the Brigade of the Guards, the Parachute Regiment and the Mechanised Infantry Regiment, is that the old regiments are not to use the numeral prefix of their transferred battalion for raising new battalions. Thus, there are gaps in the case of some old regiments.