“The Eucharistic miracle of Daroca was verified shortly before one of the numerous battles sustained by the Spanish against the Moors. The Christian commanders asked the priest in the field to celebrate Mass, but a few minutes after the Consecration, an improvised enemy attack obliged the priest to suspend the Mass and hide the consecrated Hosts amid the lines of the celebration. The Spanish left the battle victorious and the commanders asked the priest to communicate the Hosts previously consecrated. However, they were found completely covered in Blood. Even today, it is possible to venerate the blood-stained linens.”
The Eucharistic Miracle of Daroca, Spain – 1239 PDF