The demolition complicated the situation further provoking the unrest. First, there is frequently the sudden onset of fear with little provoking stimulus. Nobles rarely challenged the tsar for fear of provoking a peasant uprising. Clay began taunting and provoking Liston almost immediately after the two agreed to fight. Pregnancy was again provoking melancholy, fears and dread in Isabella. All over Europe, strange weather is provoking panic. He was paranoid about provoking the Germans. The archers succeeded in provoking the Scots into attacking. In March 1938, Germany annexed Austria, again provoking little response from other European powers. Their method was to invade Attica in the hope of provoking Athens to give battle. Other causes may include disorders within the visual system provoking optical effects. The caliph attempted to weaken the clan by provoking internal divisions.