Russia's war in Ukraine has revealed to the world in graphic detail the smorgasbord of lethal technologies that can be used to destroy one's enemy in a large-scale 21st-century clash. But despite all the capabilities of such cutting-edge military tech, Moscow's primary frontline tactic appears ripped from the playbook of World War I generals - batter Ukrainians with artillery before dispatching waves of soldiers to secure territory inch by blood-soaked inch. It's a style of warfare reminiscent of the Battle of Passchendaele - but it has proved nonetheless effective with Vladimir Putin's forces gaining territory hand over fist in eastern...