How many were wounded when the complement was 173 off 2059 men?
CREATE TABLE "table1_11793221_2" (
  "unit" text,
  "commander" text,
  "complement" text,
  "killed" text,
  "wounded" text,
  "missing" text
);
SELECT "wounded" FROM "table1_11793221_2" WHERE "complement"='173 off 2059 men';