Trettioåriga Kriget

<think>

Okay, so I need to write a bio for Trettioåriga Kriget based on the user's request. Let me start by recalling what I know about this band. First, the name translates to "Thirty Years' War" in Swedish. They're a Swedish progressive rock band that formed in the early 1970s. I remember that they were part of the progg movement in Sweden, which was a progressive music scene but also had political and social elements.

The user provided a list of their recent releases, which includes albums like "Till Horisonten" and "Seaside Air." I think some of their recent work might be reissues or live recordings, like "Progglådan - Trettioåriga Kriget (Live)" and "War Diaries, Vol. 1: 1974." That indicates they have a long history, with their early works being released in the 70s. Their latest albums might be from the 2010s or later, but I need to check if I have accurate info on their activity period.

I know they had a period of hiatus and then reunited. For example, they disbanded in the late 70s or early 80s but got back together in the 2000s. Their music style combines complex instrumentals with melodic elements, typical of prog rock. They were influenced by bands like King Crimson and Yes, but with a distinct Swedish flavor.

Looking at the album titles they provided: "War Diaries, Vol. 1: 1974" and "War Years" might be compilations or archival releases documenting their early years. "Seaside Air" was released in 2010, I believe. "Efter efter" might be a newer studio album. The mention of live albums and box sets like "Progglådan Box A" suggests they're part of a series highlighting Swedish progg bands.

I need to make sure the information is accurate. I should mention their formation year (1970?), their association with the progg movement, their musical style, key albums, hiatus, and reunion. Also, noting that they continue to release music and perform, blending their classic sound with new material. The user wants a casual, friendly tone, so avoid overly technical terms but still convey their significance in the Swedish rock scene.

I should structure it into two paragraphs: one about their origins and early career, and another about their reunion and later work. Include mentions

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