Question

What was the Bear Flag revolt a reaction to?

Answer 1

Impending war between Mexico and the US.

The American settlers in California resented the Mexican government and were fearful of oppressive reforms with rumors of a war between Mexico and the US. To secure their place, troops incited a rebellion and California declared their independence. 

Answer 2

A rumor that Mexican authorities were going to remove American settlers from province of California.Im pretty sure tell if wrong