What problems did germany face at the end of the 20th century?

Which of the following is one example of an ideological conflict that became one of the causes of world war ii?

Why was it difficult fpr unions to succeed in the 1800s

Why did un coalition troops battle iraqi forces in 1991? iraq had invaded saudi arabia, along with its other border nations.iraq had invaded kuwait, which was a major source of the world's oil.the united nations wanted to remove saddam hussein from power.the united nations wanted to prevent the trade of illegal drugs.