Moscow, October 12, Minsk news: the peacekeeping forces of the Collective Security Treaty Organization (CSTO) began to hold a joint military exercise of “unbreakable brotherhood-2020” headquarters in Vitebsk state, northern Belarus, on the 12th. More than 900 participants took part in the exercise, including peacekeepers from various member states of the organization, action teams from the Joint Staff Headquarters and the Secretariat of the organization, as well as police forces of the emergency departments of the member states of the organization, according to the white news agency. During the exercise, more than 120 pieces of military and special equipment such as helicopters and UAVs will be used. The exercise will last until the 16th. According to sidorov, chief of staff of the joint staff of the organization, there are more than 3500 peacekeeping forces. The importance and urgency of the joint military exercise has not been reduced, although the organization is unable to hold a larger-scale exercise due to the impact of the new crown epidemic this year. The CSO was established in May 2002 and evolved from the CIS collective security treaty signed in 1992. At present, there are six member states of Russia, Belarus, Kazakhstan, Tajikistan, Armenian and Kyrgyzstan. In 2009, CSO set up a peacekeeping force, which is mainly used to carry out peacekeeping missions outside its member states. Since 2012, the CSO peacekeeping forces have held “unbreakable Brotherhood” joint military exercise every year.