Can anyone help me improve my opening sentence?

I have a short story that I've been working on here and there, but recently I had a workshop teacher tell me that the opening sentence is far too vague. I am looking for other readers to give me some feedback on this opening sentence and let me know what you think of it and any suggestions you have. It's a fantasy story btw.<br><br>original sentence:<br><br>"When I first arrived in the land of the gods, the world was at war."<br><br>Some things I know I've been told to avoid:<br><br>*starting with dialogue<br>*starting with vague pronouns<br>*starting with an info dump<br>*ending with a question (this one I'm not entirely sure of, as I've seen some successful opening sentences that start with a question)<br><br>I think the only thing I can really do to improve this sentence is to replace the "when" with something else as it is slightly vague, but I'm not sure what to replace it with. I've considered "from the moment" but that is still a bit vague. I've also tried "the day that" but it seems like it's more of a young children's story type of opening. Any thoughts on this sentence?