As the comments have indicated to you. You REALLY should change the field type to a date
or datetime
(if you need H-M-S info). While you can certainly do string manipulation on a date value in a text type field, you will not have any way to use an index to make filtering/sorting/grouping that you may want to do on that field efficient.
If you need help converting I might suggest this approach. Add a new date or datetime column. Make sure to add an index on this column since you will be using it for ordering.
Then run this query:
UPDATE table SET new_date_column = STR_TO_DATE(old_date_column, '%m-%d-%Y');
Then delete the old column from the table.