No not really. You are thinking of the things used by the Romans in the arena fighting. The middle age army used swords, pitchforks, and many different types of farm equipment that could be sharpened or modified. Archers were also used and prized as fighting men. The reason the farm equipment was used is that about 80% of the men fighting were surfs and peasants and they used what they had. One or two may have fashioned a flails, but it wouldn't have been used that much. A horseman would have better use for it while riding.
Threshing flails go back long before the medieval period - they were used in the ancient Roman Empire, in Classical Greece and in ancient Egypt, as well as many other places.Threshing flails continued to be made and used all through the medieval period and up to the 19th century, when machinery was invented to do the same task.
Flails were used on some WW2 tanks to explode buried mines in front of them.
In the middle ages they used weapons such as daggers, knives, swords, clubs, flails, hammers, spears, axes, bows, muskets, slings, javelins and more. They also used animals in war like dogs and horses.
Wizards and mages used flails.
Castles in the Middle Ages were used to keep out enemies.
See the question: What are some weapons used in the middle ages?
In the Middle Ages
They were used by knights on horseback and foot soldiers.
because they used wood smoke as a deorderant in the middle ages
people in the middle ages used letters or talking to face to face
YES
to entertain