Daimler secured sole marketing rights for any AEC chassis other than those required by AEC's owner (the London General Omnibus Company), and in exchange AEC were to fit Daimler engines in their chassis.[71] This agreement was made in 1912, and continued until AEC war service vehicles had to have the Tylor engine fitted. In the late 1920s AEC and Daimler commercial division formed the Associated Daimler Company to build commercial vehicles. The association was dissolved in 1928 with each company retaining manufacture of its original products.[72]