Anglo-German Naval Agreement
The Anglo-German Naval Agreement (AGNA) of 18 June 1935 was a naval agreement between the United Kingdom and Germany that regulated the size of the Kriegsmarine in relation to the Royal Navy. The Anglo-German Naval Agreement fixed a ratio whereby the total tonnage of the Kriegsmarine was to be 35% of the total tonnage of the Royal Navy on a permanent basis.
Source: Wikipedia — Anglo-German Naval Agreement (CC BY-SA 4.0)