There are many history databases that can be useful in your hunt for materials. These are the best to start with, but be sure to go to OneSearch to find more materials. Anything here is searched in OneSearch, but going directly to the individual databases can help to control how large your retrieval is. Also, each of these databases is different, often using different key terms and language.
Finding current issues of foreign newspapers can be straightforward, if they are digital. Back issues can be more complicated. For that reason, for most searches, you should start with:
Other sources: