of Æthelflæd with her nephew
Æthelstan, erected in 1913 to commemorate the millennium of her fortification of the town. On her husband's death in 911, Æthelflæd became
Myrcna hlædige, "Lady of the Mercians". Ian Walker describes her succession as the only case of a female ruler of a kingdom in Anglo-Saxon history and "one of the most unique events in early medieval history". In Wessex, royal women were not allowed to play any political role; Alfred's wife was not granted the title of queen and was never a witness to charters in the king's lifetime. In Mercia, Alfred's sister Æthelswith had been the wife of King
Burgred of Mercia; she had witnessed charters as queen and had made grants jointly with her husband and in her own name. Æthelflæd benefited from a Mercian tradition of queenly importance, and was able to play a key role in the history of the early tenth century as Lady of the Mercians, which would not have been possible in Wessex. When Æthelred died, Edward took control of the Mercian towns of London and
Oxford and their hinterlands, which Alfred had put under Mercian control. Ian Walker suggests that Æthelflæd accepted this loss of territory in return for recognition by her brother of her position in Mercia. Alfred had constructed a network of fortified burhs in Wessex, and Edward and Æthelflæd now embarked on a programme of extending them to consolidate their defences and provide bases for attacks on the Vikings. According to
Frank Stenton, Æthelflæd led Mercian armies on expeditions, which she planned. He commented: "It was through reliance on her guardianship of Mercia that her brother was enabled to begin the forward movement against the southern Danes which is the outstanding feature of his reign". Æthelflæd had already fortified an unknown location called
Bremesburh in 910 and in 912 she built defences at Bridgnorth to cover a crossing of the
River Severn. In 913 she built forts at
Tamworth to guard against the Danes in
Leicester, and in
Stafford to cover access from the
Trent Valley. In 914 a Mercian army drawn from Gloucester and Hereford repelled a Viking invasion from Brittany, and the
Iron Age Eddisbury hill fort was repaired to protect against invasion from Northumbria or Cheshire, while
Warwick was fortified as further protection against the Leicester Danes. In 915
Chirbury was fortified to guard a route from Wales and
Runcorn on the
River Mersey. Defences were built before 914 at
Hereford, and probably
Shrewsbury and two other fortresses, at
Scergeat and
Weardbyrig, which have not been located. In 917 invasions by three Viking armies failed as Æthelflæd sent an army which captured
Derby and the territory around it. The town was one of the
Five Boroughs of the Danelaw, together with Leicester,
Lincoln,
Nottingham and
Stamford. Derby was the first to fall to the English. The
Mercian Register states that she lost "four of her thegns who were dear to her" in the battle, an unusual statement which the historian Matthew Firth argues indicates these to have been key members of her court. Clarkson, who describes Æthelflæd as "renowned as a competent war-leader", regards the victory at Derby as "her greatest triumph". At the end of the year, the East Anglian Danes submitted to Edward. In early 918, Æthelflæd gained possession of Leicester without opposition and most of the local Danish army submitted to her. A few months later, the leading men of Danish-ruled
York offered to pledge their loyalty to Æthelflæd, probably to secure her support against Norse raiders from
Ireland, but she died on 12 June 918, before she could take advantage of the offer. No similar offer is known to have been made to Edward. According to the
Three Fragments, in 918 Æthelflæd led an army of Scots and Northumbrian English against forces led by the Norse Viking leader
Ragnall at the
Battle of Corbridge in Northumbria. Historians consider this unlikely, but she may have sent a contingent to the battle. Both sides claimed victory but Ragnall was able to establish himself as ruler of Northumbria. In the
Three Fragments, Æthelflæd also formed a defensive alliance with the Scots and the
Strathclyde British, a claim accepted by Clarkson. Little is known of Æthelflæd's relations with the Welsh. The only recorded event took place in 916, when she sent an expedition to avenge the murder of a Mercian
abbot and his companions; her men destroyed the royal
crannog of
Brycheiniog on
Llangorse Lake and captured the queen and thirty-three of her companions. The incursion reestablished Mercian overlordship over Brycheiniog, which had sworn allegiance to King Alfred in the late ninth century. According to a version of the
Anglo-Saxon Chronicle strongly sympathetic to Edward the Elder, after Æthelflæd's death "the kings among the Welsh, Hywel and Clydog and Idwal, and all the Welsh people sought to have [Edward] as their lord".
Hywel Dda was king of
Dyfed in south-west Wales, Clydog ap Cadell probably king of
Powys in the north-east, and
Idwal ab Anarawd king of
Gwynedd in the north-west.
Gwent in south-east Wales was already under West Saxon lordship but, in the view of Charles-Edwards, this passage shows that the other Welsh kingdoms were under Mercian lordship until Edward took direct power over Mercia. No coins were issued with the name of Æthelred or Æthelflæd on them, but in the 910s silver pennies were minted in west Mercian towns with unusual ornamental designs on the reverse and this may have reflected Æthelflæd's desire to distinguish
specie issued under her control from that of her brother. After her death, west Mercian coin reverses were again the same as those on coins produced in Wessex. No charters of Edward survive for the period between 910 and his death in 924,. In contrast, two survive in Æthelflæd's sole name, S 224, possibly dating to 914 and S 225, dated 9 September 915, issued at
Weardbyrig, one of the burhs she built at an unidentified location. ==Death and aftermath==