Air Chief Marshal Chaudhary said the year gone by was ''quite challenging yet extremely rewarding''. ''The prompt actions in response to developments in eastern Ladakh were a testament to the Indian Air Force's combat readiness. Our efforts in completing all Covid-related tasks was also a major achievement in support of the national efforts,'' he said. The Chief of Air Staff said the security environment in the region and beyond has been ''impacted by a complex interplay of geopolitical forces''. ''Moreover, the advent of new domains over and above the traditional domains of land, sea, and air has resulted in a paradigm shift in the way military operations will be conducted,'' he said.