Complete the following reaction sequence,giving structural details of all significant intermediates X,Y,and final product Z. 
Definitions:
Europe Tour
A journey or series of visits to multiple countries in Europe, often for leisure, education, or cultural exploration.
Hero of Freedom
An individual recognized for their significant contributions, often through personal sacrifice or activism, toward the advancement of liberty and freedom for a group or society as a whole.
Union Army
The land force that fought for the Union during the American Civil War, comprised mainly of troops from the Northern states.
Blacks Served
Refers to African Americans who served, particularly in the military context, across various American conflicts, highlighting their contributions despite facing racial discrimination.
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