In battles in the philippines and puerto rico american forces were joined by

In the battles in the Philippines and Puerto Rico, American forces were joined by rebels of those countries, who were fighting Spain in order to achieve their independence.

Explanation:

In the Spanish-American War, the Americans had the support of the rebel groups of the Spanish colonies, who had the common goal of achieving their independence, sharing Spain as an enemy.

However, in the case of the Philippines, these rebels happened to face the United States after the war with Spain, because they did not want to be an American colony but to obtain full independence.

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