Tips and tricks for migrating monstrous websites from mixed sources (Drupal, static html, Cold Fusion, custom CMS ... ) into Drupal.  Based on the experience of moving several large federal websites composed of multiple combinations of legacy sites and sub-sites into one cohesive Drupal site. Federate multiple sites into one without broken links or loss of SEO history.  The concepts are version agnostic and will work for D7 or D8.

https://docs.google.com/presentation/d/1LhLJoTPyauyYETOYukC2enemnEJKOJ5S...