How did hashirama die in naruto series#

I donвЂ™t think I can add anything worthwhile but that is soooo interesting.Д«ut it did make me thinkвЂ¦ I always thought the time between Hashirama as Hokage and when the series starts wasnвЂ™t that long (dunno exactly but it doesnвЂ™t seem like much time? I mean, Hashirama and Tobirama were close in age and were back to back hokages, then Hiruzen for a good while cuz he was young and then retired to give it to Minato, then Minato for not very long, then we have Hiruzen again, etcвЂ¦ besides which, narutopedia says Kakuzu is 91, so if it was him trying to kill Hashi, then Konoha is only at least 91 years old? haha anyways), so to think that maybe HashiвЂ™s Hokage building was this tower, he survived an assassination attempt and created a death forest around it as a responseвЂ¦. Hashirama died during the turmoil preceding the First Shinobi Would War Kakazu is the only known person to survive an assassination attempt on the First Hokage The Senju Clan is essentially extinct barring Tsunade by the series start

Hashirama and Mito have at least one kid as evidenced by Nawaki and TsunadeвЂ™s existence The following canon facts are what keeps me coming back to this though: So I read a headcanon about Training Ground 44 (and heck if I can remember where, but its been eating at meвЂ¦) which states thus: The tower in the center of the Forest of Death is the original Hokage Tower and the Forest of Death was created by Hashirama due to an assassination attempt on him and his family.