Its never truely revealed in the story.
Out-of-world-explanation is pretty easy/obvious. Bethesda wanted to begin the game with a bang, so dragon, and the prison/arrival thing allows the player to have no mention worthy past, so its up to the player to form his character. Bethesda never cared too much, to tie this into the story later on, except Delphine who makes wrong suspicions and falsely points you to the Thalmor. In-world its somehow complicated.
You are viewing: Why Did Alduin Attack Helgen
Facts:
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* Alduin never attacks directly any other city himself. So Helgen was somehow special.
* Alduin never interferes another time, so for example to save Ulfric again, once you claim Windhelm.
* Alduin will actually kill you, if you linger too long outside -> he is not there to save you.
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* Alduin does not have any human followers, or is able to take a human form (no where hinted at, except the story you make up at the bards college) so he has no idea who Ulric is, and sure not of the political consequences of the event.
* Alduin will not attack you again, unless you lern the Dragonrend much later. So at helgen his not on a kill mission too you. Otherwise he would just pop up again once you leave the cave.
What I suppose makes most sense, Alduin gets kicked out of the time warp at the throat of the world, unaware what had actually happened to him. Possibly your presence as dragon born close to the timefracture might have triggered that, but maybe its also just random. For him the 3 guys who just attacked him were puff just gone. He was just mad at the uprising humankind and either just attacked the next village (Helgen is pretty close to the throat) or felt your presence and came to investigate, or supposed what he felt, would be one of them. While attacking the village he realized what happened to him, and that the other dragons are all dead, so from there on he concentrates on resurrecting them instead of attacking. He also observed you and what he felt, and judged you to be too puny to be worth of his personal attention any more.
Edited by faifh
Source: https://t-tees.com
Category: WHY
