A race riot between white and black US soldiers happened in Guam because they were fighting over prostitutes and bargirls from the local Chamorro population

http://www.kuam.com/story/36904268/2017/11/Wednesday/woman-shares-how-agana-race-riots-shaped-guam-history

The second reason says Carla, was competition for the attention of the local Chamorittas. She says this was chronicled in the transcripts of a military trial that was held against the men involved in the deadly riot. "Some of the whites testified that they felt that because they took over the island that the women belonged to them. And that's in the actual testimony. And so the blacks complained that whenever they would try to get the attention of the local ladies that they were threatened, both physically and verbally, so that was in the testimony," she said.

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