“America and our allies are fighting a new kind of war against a different kind of enemy. This conflict places great demands on the men and women of our armed forces, including our Guard and Reserve. They've met every test; they've risen to every challenge. The war also places demands on those of us in government. We took an oath to protect our country. We have a solemn responsibility to support the service men and women who defend us in the field of battle.”

Remarks by President Obama at Naturalization Ceremony for Servicemembers at The War Memorial of Korea in Seoul, Republic of Korea at April 25, 2014 http://www.whitehouse.gov/the-press-office/2014/04/25/remarks-president-obama-naturalization-ceremony-servicemembers
2014
Context: What makes us Americans is something more than just the circumstances of birth, what we look like, what God we worship, but rather it is a joyful spirit of citizenship. Citizenship demands participation and responsibility, and service to our country and to one another. And few embody that more than our men and women in uniform.

From King's Foreword in Battle Stations! Your Navy In Action (1946) by Admirals of the U.S. Navy, p. 10

2000s, 2002, Compassionate Conservatism (April 2002)

Article in The Nation newspaper on 6 December, 1845, an article entitled "Oregon—Ireland", in reference to the dispute then pending between England and America about Oregon.

2016, DNC Address (July 2016)

2011, Remarks on death of Osama bin Laden (May 2011)
Context: On September 11, 2001, in our time of grief, the American people came together. We offered our neighbors a hand, and we offered the wounded our blood. We reaffirmed our ties to each other, and our love of community and country. On that day, no matter where we came from, what God we prayed to, or what race or ethnicity we were, we were united as one American family.
We were also united in our resolve to protect our nation and to bring those who committed this vicious attack to justice. We quickly learned that the 9/11 attacks were carried out by al Qaeda — an organization headed by Osama bin Laden, which had openly declared war on the United States and was committed to killing innocents in our country and around the globe. And so we went to war against al Qaeda to protect our citizens, our friends, and our allies.

Speech to Conservative Rally at Cheltenham (3 July 1982) http://www.margaretthatcher.org/document/104989, regarding the Falkland Islands War.
First term as Prime Minister
Context: When we started out, there were the waverers and the fainthearts. The people who thought that Britain could no longer seize the initiative for herself. The people who thought we could no longer do the great things which we once did. Those who believed that our decline was irreversible—that we could never again be what we were. There were those who would not admit it—even perhaps some here today—people who would have strenuously denied the suggestion but—in their heart of hearts—they too had their secret fears that it was true: that Britain was no longer the nation that had built an Empire and ruled a quarter of the world. Well they were wrong. The lesson of the Falklands is that Britain has not changed and that this nation still has those sterling qualities which shine through our history. This generation can match their fathers and grandfathers in ability, in courage, and in resolution. We have not changed. When the demands of war and the dangers to our own people call us to arms—then we British are as we have always been: competent, courageous and resolute.

p. 691-692