Final answer:
General Ludendorff advised Kaiser Wilhelm II to sue for peace amidst internal unrest and worsening economic conditions in Germany. The Kaiser abdicated following increased pressure and the establishment of a republic, paving the way for Germany to seek an armistice with the Allies.
Step-by-step explanation:
The czar did not directly advise the Kaiser during the tumultuous period described. It was General Ludendorff who advised Kaiser Wilhelm II to sue for peace as criticism of the Kaiser grew in Germany and economic conditions worsened. The Reichstag soon passed laws making the government ministers answerable to it, signaling a significant shift in power away from the Kaiser. As protests spread and various nationalist movements declared independence, the political situation in Germany became untenable leading to the abdication of the Kaiser.
Following the advice of Ludendorff and the uprising within the country, the Kaiser eventually abdicated on November 9, 1918. He then left Germany to live in exile in the Netherlands. After his abdication, Germany was declared a republic, and a provisional government was established. In the wake of these events, Germany pursued an armistice with the Allies as it was clear that the war was unwinnable, culminating in the end of World War I.