Unity of Command Forums

The 'Lumberjack & Undertone' scenarios lists the following variants: 'hagenau, roer, hagenau_roer', I am unable to find information about these variants. Any explanations?

Generally the variants are for when you achieved the secondary objectives in the campaign in the previous scenario. They let you start in possession of some of the variant scenario’s primary objectives. Units are mostly the same just placed differently. You can check specifics in the scenario folder units.yml files (or probably just the editor).