Conversation so far:
When did Walt Disney become ill?
In November 1966, he was diagnosed with lung cancer and was treated with cobalt therapy.
Were the treatments successful?
on December 15, ten days after his 65th birthday, he died of circulatory collapse caused by lung cancer.
What happened after he died?
Disney's remains were cremated two days later, and his ashes interred at the Forest Lawn Memorial Park in Glendale, California.
What commenced after his death?
He left 45 percent of his estate to his wife and children--much in a family trust--and 10 percent to his sister, nieces and nephews.
Did the way he left his estate cause issues within the family?
He left 45 percent of his estate to his wife and children--much in a family trust--and 10 percent to his sister, nieces and nephews.
What happened after his estate got settled?
The remaining 45 percent went into a charitable trust, 95 percent of which was designated for CalArts, to build a new campus (a figure of around $15 million).

Question: What else was significant during this time period?
Self-contained rewrite: In addition to dying of circulatory collapse cause by lung cancer,  what else was significant during Walt Disney's death and aftermath?