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_name_97 (date INTEGER, u_boats_destroyed__pola_ VARCHAR)

### Question ###
What's the highest Date listed that has U-boats destroyed (Pola) of 1?

### Accurate SQL ###

SELECT MAX(date) FROM table_name_97 WHERE u_boats_destroyed__pola_ = "1"