de.wikipedia.org/wiki/Feldj%C3%A4ger#Geschichte

The sentence is inaccurate in two ways:

1. It misidentifies the unit. The British Army’s own institutional histories do not say the Royal Military Police was created in 1807. The National Army Museum states that today’s Royal Military Police traces its origins back to 1855, when the Mounted Military Police was formed at Aldershot. It further explains that the corps only later evolved into the Corps of Military Police (1926) and received the "Royal" prefix in 1946.

2. It gives the wrong Wellington-era date. The AGC Museum’s history of British military police says that in 1813 Wellington ordered the creation of the Staff Corps of Cavalry to act as a police force for the army. That is the relevant Napoleonic-era predecessor — not the Royal Military Police, and not in 1807.

So the article sentence incorrectly labels a later corps as if it already existed in 1807, and it places Wellington’s police formation six years too early. A more accurate formulation would distinguish the 1813 Staff Corps of Cavalry from the later Royal Military Police, whose lineage is officially traced to 1855.