Thanks again xxRainStarxx , @Starburst758 , and @sunrise_believer_ for the facts!
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-StarClan told Tallstar to show kindness to Firestar, even though he would've done it anyway.

-Mapleshade spoke to Tigerclaw in his mind, deeply influencing his actions like Thistleclaw had.

-Blackstar, Dustpelt, Seedpaw, Foxleap, Ferncloud, Mousefur, Hollyleaf, Sorreltail, Hazeltail, Rosepetal, and Toadstep all died before/during Bramblestar's Storm.

-The Three lose their powers in the beginning of Dovewing's Silence.

-Dustpelt had originally used Ferncloud to make Sandstorm jealous but ended up developing feelings towards Ferncloud.