A Commemorative Speech should evoke emotion in both the speaker and the audience.
Commemorative speeches often pay tribute to a specific person, group, place, event, or idea. These speeches focus more on the emotions to be felt than the content in the speech.
Therefore, your topic research won't be as in depth as it would be for an informative or persuasive or demonstrative speech.
If you do choose to write a commemorative speech, it might help you to research in one of our history databases:
Web Resources