D-Day was the beginning of the end of World War II, a war that Our Lady of Fatima had predicted would occur if mankind did not stop offending God.
In 1917, during World War I, Our Lady of Fatima connected devotion to her Immaculate Heart with peace and joined sin with war. She told the three young seers that WWI would end but "if people do not cease offending God, a worse one will break out during the Pontificate of Pius XI." This greater war, known as WWII, broke out in 1939, the year Pope Pius XI died.
To save sinners and bring about peace, Our Lady said, "God wishes to establish in the world devotion to my Immaculate Heart" specifically by offering "the Communion of reparation on the First Saturdays." She added that God punishes sin "by means of war, famine and persecutions of the Church and of the Holy Father."
Scripture also connects sin with war. The epistle of James 4:1–2 reads, "From whence are wars and contentions among you? Are they not hence, from your concupiscences, which war in your members? You covet, and have not: you kill, and envy, and can not obtain. You contend and war, and you have not, because you ask not."
Some people do pray but do so in a selfish or worldly manner, says St. James. In James 4:3 he continues, "You ask, and receive not; because you ask amiss: that you may consume it on your concupiscences."
The Church sets aside the month of June as a time devoted to the Sacred Heart of Jesus. In Her liturgy this month, She places the feast of the Immaculate Heart of Mary next to the feast of the Sacred Heart. By doing so, the Church is leading Catholics to pray to the Sacred Heart in an unselfish way that frees men from sin and brings about lasting peace.
Watch the panel discuss the root cause of war and the path to peace in The Download—D-Day.