In the same verse, yes. But there are two grammatically independent statements, separating elements 1 and 2 from 3 and 4. Element 3 and 4 are in the second half of a compound sentence. Some Bibles render this verse with a separating semicolon (making the separation stronger than ", and"). Some some Bibles just make this verse two separate sentences completely.
'And all this land will be reduced to ruins and will become an object of horror, and these nations will have to serve the king of Babylon for 70 years". - Jer. 25:11, NWT, 2013 .
You will notice that there are four elements in this verse:
1. Land (Judah) to be desolate
2. Land to become an object of horror
3. Nations to serve Babylon
4. Period of 70 years
All of these elements are tied together in a single verse, ...
The 70 years in the last half of the verse applies to the servitude. That's it. You can't push it back into the first half of the verse without breaking grammar.
To read this verse grammatically it states Judah would become desolate, an object of horror. (THOUGHT ENDS, NEW INDEPENDENT CLAUSE) The nations would serve Babylon 70 years.
As for context - ch 15, v 18 - "as it is this day." The servitude had already started at the time of the writing of Jerimiah 25.
What does servitude mean? Ch 27 is pretty explicit, listing nations, and encouraging every nation that doesn't want to be destroyed to "bring its neck under the yoke" of Babylon.