Answer :
One of the major things that led to the collapse of the German army/navy and their war effort was internal fighting among the Germans themselves regarding tactics.
WW1 led to the collapse of the German navy. As stated in Treaty of Versailles, Germans had been stripped of their naval forces and had been blamed for causing the war. They had been made to pay for all the damages they caused. This naval mutiny combined with public unrest in late 1918 convinced civilian political leaders that the Kaiser had to abdicate the power.