However , Alfred managed to contain this threat by reforming his military and setting up a system of fortified cities , known as burghs or burhs .
Over the next few years this particular Danish faction had several encounters with Alfred 's forces .
Alfred managed to contain this threat by reforming Alfred 's military and setting up a system of fortified cities , known as burghs or burhs .
Over the next few years this particular Danish faction had several encounters with Alfred 's forces .