Trump Ukraine
In short
Donald Trump faced impeachment following allegations that he withheld military aid to Ukraine to pressure the country into investigating his political rival, Joe Biden.
In plain words
The President used official government help as a bargaining chip. He wanted Ukraine to look into claims about Joe Biden to help his own re-election campaign.
A simple example
Trump paused a $400 million military aid package that Congress had already approved for Ukraine's defence.
Why it matters
This event led to the first impeachment of Donald Trump. It raised serious questions about how much a President can use foreign policy for personal political gain.
Easy to mix up
Do not confuse this political scandal with the ongoing military conflict between Russia and Ukraine.