BANGKOK — A Myanmar ethnic rebel group has captured a military regional command in Rakhine state, it said, in what would be a major blow to the junta. The Arakan Army had “completely captured” the western regional command at Ann on Friday after weeks of fighting, the group said in a statement on its Telegram channel. Ann would be the second regional military command to fall to ethnic rebels in five months and a huge blow to the military. Myanmar’s military has 14 regional commands across the country with many of them currently fighting established ethnic rebel groups or newer