 Complete the following phrase:  Three years later, Novgorod lookouts spot a Swedish army travelling along the Neva River. When alerted of the impending invasion, Alexander Yaroslavich, Prince of Novgorod, immediately begins to mobilise. Shortly thereafter he receives a letter from Birger Magnusson, a high ranking Swedish jarl and leader of the invasion. Magnusson taunts Yaroslavich, stating that there is little point in resisting. Irrespective of this, Yaroslavich marches his troops to Izhora. At the 