This is the 1588th most frequent Chinese word.
德国
Germany.
Here, '德国' is used as a proper noun referring to the country Germany.
我计划明年去德国旅行。
I plan to travel to Germany next year.
In this context, '德国的' is an adjectival phrase, meaning 'of Germany,' showing possession or relation to the country Germany.
我喜欢学习德国的文化和历史。
I enjoy learning about German culture and history.
Here, '德国' functions simply as a noun, specifying the topic of the sentence, the country Germany.