There's a great line in the old Christian hymn, "Onward Christian Soldiers," that goes like this:Like a mighty army moves the church of God;Brothers, we are treading where the saints have trod;We are not divided; all one body we,One in hope and doctrine, one in charity.While not many of us consider ourselves to be soldiers in the conventional sense, the reality is that we are soldiers for the Kingdom of Christ - soldiers unified in hope, doctrine, and love. And because we live in a world that is growing more and more hostile to the truths of Christianity, we have need to be reminded of what it means to have a wartime mentality. Here we study the opening of Jude's brief letter together, and consider his call to Christian soldiers to be ready, willing, and able to contend for the faith once for all delivered to the saints.