The situation in Iraq was dire at the end of 2006, when President George W. Bush decided to implement the surge and selected me to command it. Indeed, when I returned to Baghdad in early February 2007, I found the conditions there to be even worse than I had expected.
The central problem in Syria is that Sunni Arabs will not be willing partners against the Islamic State unless we commit to protect them and the broader Syrian population against all enemies, not just ISIS.
The fact is that Iran doesn't want to see the Taliban come back any more than do most Afghan citizens.
The art of coalition command - whether it is here in Afghanistan, whether it was in Iraq or in Bosnia or in Haiti - is to take the resources you are provided with, understand what the strengths and weaknesses are and to employ them to the best overall effect.
Life is a competitive endeavor.
The process to resolve post-Islamic State issues will be difficult and intense.
All Americans should take great pride in the men and women serving our nation in Iraq and in the courage, determination, resilience and initiative they demonstrate each and every day. It remains the greatest of honors to soldier with them.
Iran has had a very harmful effect in a variety of ways in the region... fomenting unrest to a degree in Saudi Arabia, undoubtedly in Bahrain, and definitely in Yemen with Hamas, with Lebanese Hezbollah among other activities in locations.
The Pakistani Army, the Frontier Corps, the Frontier Scouts and Police have carried out quite impressive counter-insurgency operations.
In counterinsurgency operations, the human terrain is the decisive terrain.
The formulation of sound national policy requires finding the right overarching concepts.
Committing to a particular goal publicly puts pressure on oneself. It becomes an enormous action-forcing mechanism and often helps you achieve more than you might have had you kept your goals to yourself.
Ungoverned spaces in the Islamic world will be exploited by people who wish us ill. They will not be contained.
The Afghan people do not take kindly to conquerors.
I am not a politician, and I will never be, and I say that with absolute conviction.
Leaders of the various Iraqi elements will likely have their own militias, and there will be endless rounds of brinkmanship on the road to post-Islamic State boundaries, governing structures, and distribution of power and resources.
The proximate cause of Iraq's unraveling was the increasing authoritarian, sectarian, and corrupt conduct of the Iraqi government and its leader after the departure of the last U.S. combat forces in 2011.
Mubarak would meet with me when I was at Central Command. He would lean and put his hand on my knee, as if a father figure, and say, 'General, don't ever forget the Arab Street. Listen to the Arab Street.' I'd like to go to him now and say, 'Mr. President, what about that Arab Street, what's that all about?'
I think it's reality that Iran is going to have influence in Iraq. All elements of Iraq accepted that.
Every civilian's death diminishes us, collectively.
Leadership is an individual sport, one that has to be fine-tuned to each of the people that reports to you. Leaders also need to provide the direction, energy, encouragement and inspiration for each person who reports directly to the leader as well as for the overall organization.
When I was commander of Central Command, obviously we were very concerned about the developments in Yemen, the developments in Somalia and elsewhere, in Africa and so forth. But the al Qaeda senior leadership is under unprecedented pressure.
When Western politicians propose blanket discrimination against Islam, they bolster the terrorists' propaganda.
The foremost threat to Iraq's long-term stability and the broader regional equilibrium is not the Islamic State, it is Shiite militias, many backed by - and some guided by - Iran.
I can't for the life of me think of the link between Iraq and why a fruit vendor self-immolates in Tunisia and cracks this seemingly solid crust that turns out to be so fragile that societal unrest touches off.
As you will recall, soon after the 9/11 attacks, an international coalition led by the United States conducted an impressive campaign to defeat the Taliban, al Qaeda, and other associated extremist groups in Afghanistan.
People often ask, why aren't you reading about what it is you're working on right now? And the truth is, you only get three pages a night before your eyelids close.