Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_78640 ( "Battle" text, "Date" text, "Bulgarian Commander" text, "Latin Commander" text, "Result" text )

### Question ###
On what Date was Henry I Latin Commander of the Battle of Boruy?

### Accurate SQL ###

SELECT "Date" FROM table_78640 WHERE "Latin Commander" = 'henry i' AND "Battle" = 'battle of boruy'