I was 8.
Yes, I understood what it was all about.
People here would have had a heart attack (this was back in 1965, for context) but we knew that in addition to strengthening our faith and being supported by the Holy Spirit to live Christian lives of faith, hope, and charity, and with the gifts of the Holy Spirit including wisdom, understanding, counsel, fortitude, knowledge, piety, and fear of the Lord we were also to be ‘soldiers in Christ’s army’, ready to take up our spiritual armor in defense of our Holy Faith.