On Memorial Day, we honor men and women who made the ultimate sacrifice in military service to our nation. Time and again throughout our Republic’s history, courageous Americans have ventured into harm’s way to protect the freedoms we hold dear. The liberties we enjoy wouldn’t be possible without their heroism.

A brief survey of history reminds us that freedom is rare and fragile. It’s not the norm throughout the centuries. When freedom is established, it’s often upheld at great cost through the selfless service of devoted patriots. Our Republic has endured for nearly two-an...