"Gates of Fire" by Steven Pressfield
I am almost done with this book. It is a very entertaining book about the 300 Spartans and a few thousand Allies last stand against 250,000 Persians at the choke point called Themopylae(Hot Gates)in 480BC. It's fiction, but very well written. It captures the "Warrior Ethic" very well. I highly recommend it. The language can be crude in a "one of the boys" sense.
Operation Wetback 1954 was an immigration law enforcement initiative. The program utilized special tactics to combat the problem of illegal border crossing. Overall, there were 1,078,168 apprehensions made in the first year of Operation Wetback.