Answer:
the grammar is okay but you have used capital letters where it should not be used. Also, in some places the required fullsyop and commas are missing.
That event was historically correct.
WWhich two elements should be included with each visual aid in a technical document?
I'm sorry love, but wouldn't this more History, than English? You might get more help if this is put in History where it might belong.
Hope this Helps M8!! :)