The Day of Radiological, Chemical and Biological Defense Troops is observed in Russia every November 13, marking the anniversary of the establishment of these troops, which were founded in 1913 as the Chemical Troops. This official professional day was instituted by President Vladimir Putin through a Presidential Decree in 2006. The troops are responsible for handling radiological, chemical, and biological threats, similar to the Chemical Corps of the United States Army, although their roles have expanded over time, particularly after the development of biological and nuclear weapons. While there are no special government-organized events for this day, it is primarily recognized by the personnel of the troops themselves.