die Truppe
troops
A military unit, often used in the plural to refer to soldiers.
Die Truppen wurden zur Sicherung der Grenze eingesetzt.
The troops were deployed to secure the border.

troop / troupe
Loading your saved state.
troops
A military unit, often used in the plural to refer to soldiers.
Die Truppen wurden zur Sicherung der Grenze eingesetzt.
The troops were deployed to secure the border.

If you read or hear the word in the plural — 'die Truppen' (the troops) — it almost always has the military meaning. In the singular, 'die Truppe' can have all meanings.
Die ausländischen Truppen haben das Land verlassen.
The foreign troops have left the country.
Using 'Truppe' for a group of friends is very informal and typical of spoken language. It expresses a relaxed, friendly sense of belonging.
Am Samstag treffe ich mich mit meiner alten Truppe aus der Schulzeit.
On Saturday, I'm meeting up with my old crew from school.
In an artistic context, 'Truppe' (troupe) is often used as part of compound words to specify the type of group. Typical examples are 'Theatertruppe' (theater troupe), 'Tanztruppe' (dance troupe), or 'Zirkustruppe' (circus troupe).
Die Tanztruppe tourt gerade durch ganz Deutschland.
The dance troupe is currently touring all over Germany.
group
'die Gruppe' and 'die Truppe' can both refer to several people who belong together or do something together. 'die Gruppe' is neutral and very general. You can use it almost anywhere, for example for learners, travelers, or things. 'die Truppe' has more specific uses: in the military for soldiers, for artists and performers, or colloquially for a team or clique. 'Truppe' often sounds more casual or suggests a stronger sense of togetherness and shared action. Learners may confuse the words because both describe people together. In neutral situations, 'Gruppe' is safer; 'Truppe' fits when the special tone or context is intended.

Die ganze Truppe half mit, als der alte Schrank getragen werden musste.
The whole crew helped when the old cabinet had to be carried.
In der Bibliothek arbeitet die Gruppe leise an ihrem Projekt.
In the library, the group is working quietly on its project.