Found out about them last year, when Sweden got added to World of Tanks (console). They had a stupidly powerful premium tank piloted by the lead singer, and you could unlock the rest of the band as premium Swedish tank crews through an op.
Of course, that all happened shortly before I stopped playing the game for good due to a mixture of increasingly irritating game decisions made by the company and increasingly toxic players.
Lily Was Here- Candy Dulfer