I noticed that in Evangelical Lutheran Worship, the worship book of my church, there are no specific prayers for Memorial Day or the occasion of remembering those who died in service to our country. There are prayers for the armed forces and for our nation's leaders and other related topics, but nothing that quited seemed to me to fit for Memorial Day. So, I crafted a prayer for Memorial Day. Feel free to use, adapt, edit, or ignore.
Almighty God, you are our strength and our shield. We give you thanks for the men and women of our armed forces, past and present, and especially for those who have died while serving. May their sacrifices serve the cause of peace, and may our nation be ever grateful for their service. With your wisdom and strength guide our military's leaders, and give to all people a desire for justice and peace. We pray in the name of Jesus Christ, who lives and reigns with you and the Holy Spirit, one God, now and forever. Amen.
A good and safe Memorial Day weekend to you all!