What did Æthelflæd build to defend against the Vikings?
Castles
Bridges
Fortified burhs
Moats
Answer
Æthelflæd built a network of fortified burhs, or fortified settlements, as part of her defense strategy against the Vikings. These were built in towns such as Wednesbury, Bridgnorth, Tamworth, Stafford, Warwick, Chirbury and Runcorn.