What is associated with: august 23 1959 she joins charlie browns family as his younger sister?

What is associated with: august 21 1968 this nation invaded by russians and four other warsaw pact forces? Based on the clue 'august 21 half a million people march through the ...', what is the answer? What is associated with: august 22 1962 when his limousine was attacked near paris? What is associated with: august 22 1989 this pitcher fans 500th? Based on the clue 'august 23 is the feast of st rose of this capital ...', what is the answer? What is associated with: august 27 1908 near stonewall texas? What is associated with: august 29 1941 pozarevac serbia? Based on the clue 'august 3 this hyphenated 95 year old photographer ...', what is the answer?