is target's history relavant when doing an svn merge?

I have a site at:

./site1/blog

I'd like to run an svn merge between between vendor branch releases
that target ./site1/blog, I want to know if the history of the target
path is relavent in an 'svn merge' command:

$ svn merge ./vendor/wordpress/1.0 ./vendor/wordpress/2.0 ./site1/blog

(merge 1.0 and 2.0 into site1/blog)

-- 
Anthony Ettinger
408-656-2473
http://anthony.ettinger.name
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