Pieces of info. We know Titan was attacked but it wasn’t the only location. A Speaker alive at the time recalls there being extremely bad natural hazards and plagued occurring everywhere. Cayde recalls being gripped and held in place before some happened. According to city records, on the first day the sky went black, on the next the Traveler fell or something like that. According to Henrietta Meyrin, beasts that sounds like mechanical compressors and smelled of wet earth attacked the Niobe Labs at the time. All of this is from the Last Days of Kraken Mare, Constellations, The Taken King collectors edition journal, the season of arrivals cinematic and Black Armoury Pages. As for a timeline, nothing.