Three quotes that reveal the mind and heart of the Catholic Church regarding honorable military service, terrorism, the united sacrifices of military families, and the vocational generosity of soldiers:
As my Grandmother often said to me, "war is hell." She knew as she had a husband and son that fought in both world wars, had nephews and a grandson go off to faraway places. She prayed, worried, and suffered because of war. Nonetheless, she knew, like so many of us do, that without the sacrifices of themselves and their loved ones, there would be no enduring freedom. (Fr. John Corapi)
1. Peace is not simply the absence of war. Peace is the presence of justice. The irony of human affairs is that sometimes evil is so pressing and so destructive that the innocent can't be defended except through the cost of blood and lives. And that brings us to our conversation tonight. Virtuous military leaders are vital in defending a free people because securing the peace and the conduct of war are morally loaded enterprises. This is also why the military profession is not simply necessary or useful, but honorable. It's why your vocation as future military officers matters. It's why your lives matter - to serve God by serving other people in the vocation He calls you to.
---Archbishop Charles Chaput, Address to Air Force Academy Cadets, March 9, 2009
2) Those who are sworn to serve their country in the armed forces are servants of the security and freedom of nations. If they carry out their duty honorably, they truly contribute to the common good of the nation and the maintenance of peace.
--- Catechism of the Catholic Church, 2310
3) In the present circumstances, how can we speak of justice and forgiveness as the source and condition of peace? We can and we must, no matter how difficult this may be; a difficulty which comes from thinking that justice and forgiveness are irreconcilable. But forgiveness is the opposite of resentment and revenge, not of justice. In fact, true peace is "the work of justice" (Is 32: 17). True peace therefore is the fruit of justice. ... Forgiveness is in no way opposed to justice, as if to forgive meant to overlook the need to right the wrong done. It is rather the fullness of justice, leading to that tranquility of order which is much more than a fragile and temporary cessation of hostilities, involving as it does the deepest healing of the wounds which fester in human hearts. Justice and forgiveness are both essential to such healing.
---Pope John Paul II's "No Peace Without Justice, No Justice Without Forgiveness", World Day of Peace 2002