We need to translate visible text content while preserving HTML tags exactly. Must output only the translation, nothing else. So we need to translate each text node. Let's go through the HTML:

We all know that World War II started when Nazi Germany, under the leadership ... How were they able to do so?

Translate to Japanese. Second

Before the second world war ended, ... “Canadian Meteor Service.

Third

Why Did Nazi Germany Need A Weather Station in the First Place?

Then

When we talk about World War II, ... ahead.

While some would have ... cold weather.

Aside from forecasting the weather, concealment was essential. By keeping the movement of their naval ships and submarines a secret, they can cover more ground. (Source: War History Online)

How Did They Start Building the Weather Station?

Before they were able to start the project, there were already 26 other stations. The Arctic and Sub-Arctic regions had 14 stations,