President Elect Trump's apparent pick for Secretary of Defense is General James Mattis. In his public vetting an email he wrote several years ago about the importance of military commanders reading has come to light.
There are several excellent statements by Mattis in his email. Check it out here.
His concluding statement captures the essence of his message-
"As a result (of reading), the enemy has paid when I had the opportunity to go against them, and I believe that many of my young guys lived because I didn’t waste their lives because I didn’t have the vision in my mind of how to destroy the enemy at least cost to our guys and to the innocents on the battlefields".