The Battle of the Trench (Arabic: غزوة الخندق, romanized: Ghazwat al-Khandaq), also known as the Battle of Khandaq (Arabic: معركة الخندق, romanized: Ma’rakah al-Khandaq) and the Battle of the Confederates (Arabic: غزوة الاحزاب, romanized: Ghazwat al-Ahzab), took place in year 627; it was a 27-day-long defense by Muslims of Yathrib (now Medina) from Arab and Jewish tribes. The strength of the confederate armies is estimated at around 10,000 men with six hundred horses and some camels, while the Medinan defenders numbered 3,000.