Again, I'm sticking to physical similarities but also on actors that can portray the energy and character that I've researched each hero had.
So, for the temperamental and strong-headed colonel Pedro Lagos I could not make a better choice than to call Pepe Sarmiento.

He was more than happy to be in the film. In fact, he happens to have Chilean family (his mother was Chilean)
We shuffled actor names that could play General Baquedano and a couple of names came to mind....specially one.
And he happens to be back in Lima after being in Argentina for years.
I think the stars are aligning for me!!