Tatra 111 is a Czechoslovakian truck from World War II and the post-war period. The first prototypes of this car were made in 1941 or 1942, and serial production was carried out in 1942-1962. The drive was provided by a single 12-cylinder Tatra V910 engine with a maximum power of 210 HP. The Tatra 111 was designed by Hans Ledwinek for the Wehrmacht as a new off-road truck. The car turned out to be a very successful design. It was characterized by reliability, a good power-to-weight ratio, good driving dynamics and good off-road properties. The vehicle also had a maximum load capacity of 10 tons and could tow a semi-trailer weighing up to 22 tons, which at that time was more than a good result. These features meant that after 1945 its production was continued for both civil and military needs. Based on the basic version, various specialized versions were also created, for example: a tank car (Tatra 111 C).Tatra 815 is a symbol of a family of Czechoslovak (now Czech) trucks, widely used, mainly used as typical transport vehicles. The drive is provided by numerous engines manufactured by companies such as Tatra, Deutz, Cummins or Catterpilar with a capacity of 6 to 18 liters and power from 330 to 590 HP. Serial production started in 1983 and is still going on. The Tatra 815 family of cars was developed as a successor to the Tatra 813 trucks. From the very beginning, it was adapted to off-road driving, most often using all-wheel drive. It also uses classic Tatra solutions in the field of chassis and suspension construction. In Europe, Tatra 815 is primarily used on the civil market, by petrochemical and mining companies, but also by logistics. In the United States, it was adapted primarily to act as a fire truck, where it is sold under the American Truck Company brand. Military versions are used by the armed forces of countries such as the Czech Republic, India, Sri-Lanka and Saudi Arabia.