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_2477 ( "Period" text, "Civilians" real, "Security forces" real, "Insurgents" real, "Total per period" real )

### Question ###
How many insurgents have 602 as the total per period?

### Accurate SQL ###

SELECT MAX("Insurgents") FROM table_2477 WHERE "Total per period" = '602'