The Waler takes its name from New South Wales, the Australian colony where the breed type first developed during the early 19th century. Originally a general term for horses bred in New South Wales, "Waler" evolved to describe a distinct type recognized for exceptional qualities that made these horses famous worldwide. The name honors the geographic origin while acknowledging the specific characteristics that distinguished these horses from other Australian stock.
The Waler Horse Society of Australia, established in 1986, maintains the breed registry and works to preserve and promote surviving Waler bloodlines. The organization documents pedigrees, establishes breeding standards, and advocates for recognition of the Waler's historical and genetic significance. Their efforts have been instrumental in preventing the breed's complete disappearance following decades of neglect.
Historically, Walers were also known as Australian cavalry horses or simply Australian horses in military contexts. British and Indian Army records from the 19th and early 20th centuries document the exceptional reputation these horses earned as military mounts. The term "Waler" appears in military correspondence and procurement records, cementing the name's association with cavalry service.
The breed's foundation incorporated diverse bloodlines brought to Australia by early colonists. Thoroughbreds, Arabians, and various British breeds including Cleveland Bays, Hackneys, and draft crosses contributed to the developing type. This genetic diversity, combined with challenging environmental conditions, produced horses combining the best qualities of multiple breeds while developing unique adaptations to Australian conditions.

