More than 3,000 troops are taking part in "Operation Joint Warrior" in and around Galloway Forest in Dumfriesshire.
A group of British and French paratroopers are also carrying out a parachute drop near to the Braid Fell area.
More top news
Residents are being asked for feedback on how to improve transport networks in the region, following a landmark Transport Summit.
Former council education chief attacks 'serious shortcoming' in Curriculum for Excellence.
Cumbria is launching its first full-time recruitment campaign in eight years and is keen to attract people from LGBT and ethnic backgrounds.