[ad_1] Ukraine’s military had only one Bohdana artillery cannon in its arsenal when Russia invaded the country two years ago. Yet that single weapon, built in Ukraine in 2018 and able to shoot NATO-caliber rounds, proved so effective in the earliest days of the war that it was trucked to battlefields across the country, from the northeastern city of Kharkiv to the southwestern coast along the Black Sea and points in between. Now, Ukraine’s arms industry is building eight of the self-propelled Bohdana artillery systems each month, and although officials…