Complex sentence: The Stallion 4x4 and Stallion 6x6 have tackled the toughest challenges-altitudes ranging from sea level to 5500 metres, temperatures ranging from -35 Degrees Celsius to +55 Degrees Celsius on varied terrains from the sands of the Thar Desert to the mountainous regions of Kargil.
Split into simpler sentences: The Stallion 4x4 and Stallion 6x6 have tackled the toughest challenges across varied terrain and climatic zones such as Alpine, Subtropical, Tropical and Arid zones. It has been operational on varied terrains from the sands of the Thar Desert to the mountainous regions of Kargil.