What is associated with: a strike was organized in 1870 by these knights of the key?

What is associated with: a strike by this union shut down ups for 15 days in 1997? What is associated with: a strike for better pay by the workers of the bo in july 1877 soon spread to other companies i… Based on the clue 'a strike is a stoppage of work by the workers thi...', what is the answer? What is associated with: a strike started by workers of this railroad co paralyzed the us economy in 1894 until broken… Based on the clue 'a strikebreaker or a blood clot on surface of ones...', what is the answer? Based on the clue 'a striker can be declared out if hes lbw leg befor...', what is the answer? What is referred to by 'a strikingly attractive woman'? Based on the clue 'a string instrument with a secret the red', what is the answer?