In 1917,, when our Blessed Mother appeared to Lucia, Fransisco, and Jacinta, after showing them hell she continued speaking about World War I and warned that a worse war along with famine and persecutionof the Church especaially of the Holy Father would come about if people did not cease offending God. Then she added, in her great marternal love for us, "to prevent this I shall come to ask for the consecration of Russia to my Immaculate Heart and the communion of reparation on the First Saturdays." 
Our Lady did add a message of hope when she said, "In the end, my Immaculate Heart will triumph."