Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_2596811_12 (commander VARCHAR, killed VARCHAR)
### Question:
What is the number of commanders that had 0 off 63 men killed?
### Answer:
SELECT COUNT(commander) FROM table_2596811_12 WHERE killed = "0 off 63 men"