How did warlord uprisings and foreign imperialism lead to the may fourth movement

The uprisings of warlords and foreign imperialism weakened China which eventually lead to the May Fourth Movement. Since China was weakened, other countries took this approach and ended up taking advantage of China. The May Fourth Movement started on May 4, 1919, and was originated by the protesting of students to stop imperialism. They wanted to put an end to imperialism and stop cultural wars.

entering that problem on the tube you may come up with an answer

a stronger central government  

its what they are