1921: Lanz introduces the world's first crude oil tractor, the 12 hp Bulldog HL. The tractor is powered by a horizontal one cylinder engine, the so-called glow-head engine. The peculiar shape of the cylinder head and the protective cap above it give the tractor the name Bulldog. The tractor was designed by Dr. Fritz Huber.

1936: Lanz sells the first express Bulldogs. With these machines, the transport problem in agriculture can be decisively improved. The Eilbulldogs are also increasingly used by hauliers for road transport.

1942: The 100,000th Bulldog leaves the Mannheim factory.

1945: The bombing destroys 90% of all buildings on the factory site and more than half of the machines are unusable. In the summer of 1945, however, the American occupation authorities grant production permission. Reconstruction, however, proceeds slowly.

1953: On 9 February, the 150,000th Bulldog rolls off the assembly line. Of the tractors, 30,000 go abroad, while 120,000 remain at home.

1956: The 200,000th Bulldog is manufactured in this year. At the same time, John Deere takes over Heinrich Lanz Ag with its factories in Germany and Spain.

1960: After almost 40 years, production of the Lanz Bulldog with the horizontal single-cylinder two-stroke engine ends. The two successor models, the John Deere-Lanz 300 with 28 hp and the John Deere-Lanz 500 with 36 hp, are launched. They are powered by modern four cylinder, four-stroke diesel engines.

1962/63: The tractor range is supplemented by the three models 100, 700 and 3010.

1967: The company name is changed again and the tractor bonnets now only say John Deere without the Lanz suffix.

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