If there was any doubt left that we are at war all over the world, let that doubt be completely dispelled.
The specific reason: a classified executive order called, "AQN Ex Ord or Al Qaeda Network Executive Order , , signed by then Secretary of Defense Donald Rumsfeld in early 2004." 
The order allows "US Special Forces to move into denied areas or countries beyond the official battle zones of Iraq and Afghanistan." 
What began under Bush Jr., "President Obama has reserved the right for US forces to operate lethally and unilaterally in any country around the globe in pursuit of alleged high-value terrorists,"  (this was obviously the executive order used by President Obama to take out Osama bin Laden in Pakistan).
To put it simply, we reserve the right to enter ANY country to go after anyone we want to. There are no issues of a nation's sovereignty, the Geneva Convention on war or any other treaty or international agreement we may have previously entered into and signed. This is all superseded by the aforementioned executive order.
For all intents and purposes our diplomacy with other countries, the treaties and international agreements we previously entered into with all of them are in reality null and void. We have betrayed their trust with this executive order.
Sure we'll continue the charade of being a respected member of the international community of nations and a country that abides by the rules of international law, but reality says otherwise.
We may even have a Constitution with its separation of powers which mandates separate and equal legislative and judicial branches along with the executive.
But the legislative branch (Congress) has relinquished and abdicated its powers to the executive and has become a mere impediment and sometimes inconvenience to the supreme powers now assumed by the executive. Meanwhile the Supreme Court has remained neutral regarding the respective powers of the executive and the Congress vis-à-vis the Constitution (thus effectively giving the executive a free hand to do as he pleases).
So though the assumption of power is clearly un-Constitutional and illegal, the executive has in reality become a dictatorship while the country retains the appearance and trappings of a representative democracy.
Like the Roman Republic before it some two thousand years ago which subsequently became the Roman Empire in fact (with the ascension of Julius Caesar as Emperor and the deference of the Roman Senate), our republic has in fact descended into an empire.
And with this reality of our imperial over-reach we should no longer wonder why much of the world mistrusts us or even hates us. We have brought this on ourselves.
We have created, through our policies most of the terrorism that exists in the world.
We the people have not been vigilant. Our passiveness and acquiescence has made us enablers to a government run amok that commits us to unnecessary and endless wars against a terrorism our government's policies created.
We may deceive ourselves with our American "exceptionalism", our sense of "entitlement" and the egocentric belief the world wants to be like us.
This a mirage, a fantasy and our ultimate illusion.