Did You Know:  

In 'days of old' a fixed fortified structure with artillery pieces was referred to as a 'battery'; however, artillery in the field was grouped into 'troops' and 'companies'. In 1722 the companies were organised into a regiment which was named the Royal Regiment of Artillery and in the late 1850s the (Artillery) term 'company' was re-titled as 'battalion' and, in time, again re-titled as 'regiment'. Over the same period the 'troops' were re-designated as 'batteries'.