By Rachel Hagan The Kremlin has drawn up plans for the use of tactical nuclear weapons in the event of an invasion by enemies, including China, leaked military files reveal. The 29 leaked files outline potential conditions for the use of nuclear weapons to achieve an array of offensive goals such as “containing states from using aggression … or escalating military conflicts”, “stopping aggression”, preventing Russian forces from losing battles or territory, and making Russia’s navy “more effective”. These files include details of wargames — war simulations often conducted for military strategi…