Say we are able to mass produce clones for our clone army and give them memories. Then we decide to give them the same template/personality/identity/etc.
What psychological effects would this have on the clones?
EDIT : They know they're clones.
How do you interact with other members of H. sapiens?
What you describe is a clone that is mostly alike. They get to have different memories from the moment they are born.
From a genetic perspective, something like 99.4% of our genome is cloned. How do you treat your almost-clones?
Really, the more important psychological question is whether you treat them as an individual or not. If you call them all by numbers and give them bar codes, psychoses should form. However, if you recognize them as unique human beings, despite having the same appearances, they should treat themselves as unique individuals as well.
Instinctively, I think tattooing would be popular. You should decide whether that is acceptable for your army or not. Tattooing would be a very powerful way to create uniqueness in a sea of identicalness. I think that it would be very popular, should you choose to admit it in your army.
When identical twins interact with each other, they're effectively dealing with clones -- they have the same genetics and even the same birthdate. Of course these twins also interact with others, but the same principles would apply:
There are twins in my family. I haven't mixed them up in person since I was three years old. It is more difficult on pictures, especially old ones. As a kid, I couldn't understand how strangers could mistake the two ...