Complex sentence: Many military Snow Tracs were used by NATO forces as well as British forces, the Snow Tracs were later replaced by the 4 track articulated Volvo BV202, and those were later replaced by a more evolved and amphibious BV206.
Split into simpler sentences: Many military Snow Tracs were used by NATO forces as well as British forces. The Snow Tracs were later replaced by the 4-track articulated Volvo BV202, and those were later replaced by a more evolved and amphibious BV206.