Three American presidents, Andrew Johnson, Bill Clinton, and Donald Trump, have been impeached. Impeachment is the investigation that takes place when an elected official is accused of illegal activity.

True

Explanation:

This is true as the Three American presidents, Andrew Johnson, Bill Clinton, and Donald Trump, faced impeachment during their tenure although the impeachment processes weren’t a success.

We can also define Impeachment as an investigative process that takes place when an elected official is accused of illegality in any form.

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.