1005

By place

Europe

• Spring - The Republic of Pisa conducts a military offensive against the Saracen strongholds in Southern Italy. The Pisan fleet sacks the city of Reggio Calabria. Pisa becomes one of the four commercial Maritime Republics, which fight each other for control of the Mediterranean Sea.

  British Isles

• High King Brian Boru makes a second expedition to the north, to take hostages from the northern kingdoms. During this campaign he visits Armagh – making an offering of 20 ounces of gold to the church and confirming to the apostolic see of Saint Patrick, ecclesiastical supremacy over the whole of Ireland.
• March 25 - King Kenneth III is killed in the battle of Monzievaird in Strathearn. He is succeeded by his cousin Malcolm II as ruler of Scotland.
• Summer - Danish Viking raiders under Sweyn I continue to ravage the cities in Southern England. A famine strikes Sweyn's army, which has to live off the land.
• November 16 - Ælfric of Abingdon, archbishop of Canterbury, leaves ships to the people of Wiltshire and Kent in his will. Leaving the best one, equipped for 60 men, to King Æthelred the Unready.

  Asia

• January 13-18- The Shanyuan Treaty is negotiated between the Liao Dynasty and the Song Dynasty. The Song government agrees to pay an annual tribute of 200,000 bolts of raw silk and 100,000 taels of silver. Ending the northern border clashes against Liao.
• Lê Trung Tông succeeds his father Lê Hoàn as emperor of the Early Lê Dynasty, preceding anarchy and 8 months succession war with other princes. Lê Ngoạ Triều succeeds his brother Lê Trung Tông, killing him after just a 3-days reign.
• The Shūi Wakashū is compiled by Emperor Kazan of Japan.