courtesy of my friends at the Oscar Romero Catholic Worker House in Oklahoma City (who keep the wondrous website Access to Catholic Social Justice Teachings linked in the sidebar):

Daily Prayers in Time of War

Let thy mercy, O Lord, be upon us according as we hope in thee.

Our Lady of Sorrows,
we pray for those who will die today
because of war, economic chaos, injustice, and exploitation,
especially the children.

Prepare them for the agony, despair,
and terror of the violence that is upon them.
Comfort them and hold them close to the
bosom of thy Wounded Heart as they drink deeply
of the bitter cup which is forced upon them.

Wipe their tears, calm their fears,
welcome them to peace and safety.
Eternal rest grant to them,
and may perpetual light shine upon them.

Holy Mary, Mother of God, help the helpless,
strengthen the fearful, comfort the sorrowful,
bring justice to the poor, peace to all nations,
and solidarity among all peoples.

Overturn the thrones of tyranny and scatter the unjust.
Cast down the bloody rulers who make the cry of
the widow and orphan rise to heaven.
Open our eyes to see the beauty, joy,
redemption, and goodness which comes
through obedience to the Gospel of your Son our Lord.

Teach us to be a refuge of hope for all
who are oppressed by injustice and violence.
Give us strength to stand against the
demonic powers which prowl about the world
seeking the ruin of souls. Amen.

O Christ God, Lord of Glory,
who gave us joy and blessing from your Mother's womb,
have mercy on us and save us.

Remember, St. Joseph, most humble and loving protector of the poor,
that no one ever had recourse to your protection
or asked your aid without obtaining relief.
Confiding therefore in your goodness,
we come before you and pray to you on behalf of all those at risk
today of war, economic catastrophe, and injustice..
Holy Joseph, help the helpless, comfort the dying,
bring justice to the poor, and peace to all nations.
Bless our enemies with reconciliation,
and bless our nation by removing from us the temptations of
empire, wealth, violence, and greed,
so that we might realize the promise of our ancestors and
be a blessing to all the peoples of this good earth.

O Christ God, Lord of Glory,
who gave us joy and blessing from your Mother's womb,
have mercy on us and save us.

St. Michael the Archangel, defend us in battle.
Be our shield against the wickedness and snares of the devil.
May God rebuke him, we humbly pray, and do thou,
O Prince of the Heavenly Host, by the power of God thrust into hell Satan
and all the evil spirits which prowl about the world seeking the ruin of souls.

O Christ God, Lord of Glory,
who gave us joy and blessing from your Mother's womb,
have mercy on us and save us.

O Mary, bright dawn of the new world,
Mother of the living, to you do we entrust the cause of life:

Look down, O Mother,
upon the vast numbers of babies not allowed to be born,
of the poor whose lives are made difficult,
of men and women who are victims of brutal violence,
of the elderly and the sick killed by indifference or out of misguided mercy.

Grant that all who believe in your Son may
proclaim the Gospel of life with honesty and love to the people of our time.

Obtain for them the grace to accept that Gospel as a gift ever new,
the joy of celebrating it with gratitude throughout their lives
and the courage to bear witness to it resolutely,
in order to build, together with all people of good will,
the civilization of truth and love, to the praise and glory of God, the Creator and lover of life. Amen.

O Christ God, Lord of Glory,
who gave us joy and blessing from your Mother's womb,
have mercy on us and save us.
.