West Germany officially joined the trans-Atlantic alliance in 1955. However, it wasn't until after reunification in 1990 that the German government considered "out of area" missions led by NATO. From peacekeeping to deterrence, Germany's Bundeswehr has since been deployed in several countries across the globe in defense of its allies.

In 1995, Germany participated in its first "out of area" NATO mission as part of a UN-mandated peacekeeping mission in Bosnia and Herzegovina. During the deployment, German soldiers joined other NATO member forces to provide security in the wake of the Bosnian War. The peacekeeping mission included more than 60,000 troops from NATO's member states and partners.

Since the beginning of the NATO-led peacekeeping mission in Kosovo, some 8,500 German soldiers have been deployed in the young country. In 1999, NATO launched an air assault against Serbian forces accused of carrying out a brutal crackdown against ethnic Albanian separatists and their civilian supporters. Approximately 550 Bundeswehr troops are still stationed in Kosovo.

In 2016, Germany deployed its combat support ship "Bonn" to lead a NATO mission backed by the EU in the Aegean Sea. The mission included conducting "reconnaissance, monitoring and surveillance of illegal crossings" in Greek and Turkish territorial waters at the height of the migration crisis. Germany, Greece and Turkey had requested assistance from the trans-Atlantic alliance.

In 2003, Germany's parliament voted to send Bundeswehr troops to Afghanistan in support of the NATO-led International Security Assistance Force (ISAF). Germany became the third-largest contributor of troops and led the Regional Command North. More than 50 German troops were killed during the mission. Germany withdrew the last of its troops in June 2021 as part of the US-led exit from Afghanistan.

Forming part of NATO's "enhanced forward presence" in the Baltic states, 450 Bundeswehr soldiers have been deployed to Lithuania since 2017. The battalion-size battlegroups there are led by Germany, Canada, the UK and US to reinforce collective defense on the alliance's eastern flank. It forms the "biggest reinforcement of Alliance collective defense in a generation," according to NATO.

US President Donald Trump has offered both candid praise and unabashed criticism of Germany and its policies. From calling German Chancellor Angela Merkel "possibly the greatest world leader" to describing her open-door refugee policy as a "catastrophic mistake," here are his most memorable quotes regarding Germany.

"Germany's like sitting back silent, collecting money and making a fortune with probably the greatest leader in the world today, Merkel," Trump said in a 2015 interview with US news magazine Time.

"The Germans are bad, very bad ... Look at the millions of cars they sell in the US. Terrible. We'll stop that," Trump said during a NATO leaders summit, according to German news magazine Der Spiegel, which cited sources at the alliance's meeting.

"As far as wiretapping, I guess, by - you know - [the Obama] administration, at least we have something in common, perhaps," Trump said in March during a press conference with Merkel. He was referring to his unproven allegations that ex-President Barack Obama tapped his phone. There was widespread anger in Germany in 2013 when it was revealed the US National Security Agency tapped Merkel's phone.

"I think she made one very catastrophic mistake and that was taking all of these illegals (sic), you know taking all of the people from wherever they come from," Trump said in a joint interview published by German daily Bild and British newspaper The Times, referring to Merkel's open-door policy for refugees fleeing war and persecution.

"Despite what you have heard from the fake news, I had a great meeting with German Chancellor Angela Merkel. Nevertheless, Germany owes vast sums of money to NATO and the United States must be paid more for the powerful, and very expensive, defense it provides to Germany," Trump said in a two-tweet statement after meeting with Merkel for the first time in March 2017.

"The people of Germany are turning against their leadership as migration is rocking the already tenuous Berlin coalition," Trump tweeted in the midst of a row within the German goverment. He went on to claim that: "Crime in Germany is way up. Big mistake made all over Europe in allowing millions of people in who have so strongly and violently changed their culture!"