I’ve heard about the boots in the army, should I wear two pairs of socks?

Johnathon Greer I've been in the military a long time. I've never worn two pairs of socks with my combat boots. I agree with those who've responded here that you need to wear the boots that fit your feet. If you get blisters, chances are the boots do not fit correctly and are rubbing on your feet as you walk. You foot powder to keep your feet dry and change your socks often if you're going to walking around in them all day. Hope that helps you out.

First, all boots need to be broken in and there will always be a period of blisters when you start wearing them on forced marches.
Second, you can replace the insoles to make them more comfortable and if you do a lot of rucking then think about a set of custom arches.
Third, the size of the boot depends on how your feet feel at the end of they day when you've been walking around and your feet expands. You should go slightly bigger to accommodate your feet expanding, but just a little. Too much room in the shoe can cause chafing and rubbing or other discomforts. (Remember blisters = friction, sweat/moisture, and heat.) Going smaller isn't a good idea.
Fourth, keep your feet dry by powdering your feet before a road march, then change your socks periodically, and after the road march before you go to bed apply some kind of moisturizer to your dry feet. Also treat all blisters, and peels. If you have to do another march the next day then mole skin helps. Note there is also anti-blister/rash cream you can buy to minimize blisters and heat rashes on other parts of your body.

The two sock thing is something I heard of, but it was a combination of a thin sock (like a dress sock) underneath a thicker wool sock. The idea was the thinner sock would absorb the sweat from your feet and the thicker sock would add more cushioning. Keep in mind if you use white socks they are probably made from cotton which is not good for marching in. I believe the army was also moving away from cotton tee-shirts as well and headed for dry wick shirts.

Food for thought, in my days the infantry was full of hard asses who believed in toughening your feet with calluses and we would do short marches in boots without socks. Hah!

Anyway I wouldn't fret too much or place much value in scuttlebutt talk, your DI or DS will square you away. If you think your feet is only your problem during a road march you are in for a big surprise. I remember the first time I had chaffing in my groin area and the skin was so tender it cracked. After awhile it burned. I remember seeing people in my unit after the road march walking around like penguins. Haha, those were the days.

Back when we had these, maybe. The issued boots now are much better. Get them sized properly and wear the issued socks. You'll be taught how to care for your feet. Powder, changing socks, etc. someone else mentioned walking before you get your Basic Training. That too.