Two examples would be: great depression and world war 2
Learn the local language, wear more neutral clothing instead of their traditional or foreign style. Make safe havens in the community, some assimilation is done to protect the current culture of the area, but some are done to protect the new movement of culture.
Posting warning and hazard signs near a pond, fencing your pool, etc etc
Answer:
I am so sorry, I have none. ~Narancia