Final answer:
Germany did not honor the Sussex Pledge indefinitely; they resumed unrestricted submarine warfare in January 1917, which led to the United States entering World War I. The statement is false.
Step-by-step explanation:
The statement that Germany honored the Sussex Pledge and didn’t use unrestricted submarine warfare anymore is false. While the Sussex Pledge was a promise made by Germany to limit its submarine warfare following the sinking of the French passenger ship Sussex in 1916, the commitment to this pledge was short-lived. In January 1917, Germany resumed unrestricted submarine warfare, believing it was essential to win the war quickly before the British blockade could starve Germany out of food and supplies.
Initially, the Sussex Pledge required German submarines to surface and warn ships before attacking, allowing for the evacuation of civilians. However, this restriction ultimately proved impractical, and Germany began to target all ships, including those of neutral nations, in designated war zones. This aggressive strategy was a key factor that led to the United States entering World War I.