What country joined World War I in 1917 after the United States entered the war?
Answer: Romania
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Generate a historical trivia question about the following topic.

### Input:
Topic: World War I

### Response:
What country joined World War I in 1917 after the United States entered the war?
Answer: Romania
assistant

Here's a historical trivia question about World War I:

What was the name of the German battle plan developed in 1916 that relied on a massive artillery bombardment to weaken Allied defenses before a massive infantry assault, resulting in the Battle of Verdun?

A) Schlieffen Plan
B) Moltke Plan
C) Ludendorff Plan
D) Schliephof Plan

Answer: C) Ludendorff Plan