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_2147588_3 ( reason_for_change VARCHAR, date_of_successors_formal_installation VARCHAR )

### Question ###
What was the reason for change in staff in formal installations on March 15, 1865?

### Accurate SQL ###

SELECT reason_for_change FROM table_2147588_3 WHERE date_of_successors_formal_installation = "March 15, 1865"