The Battle of Rehe (simplified Chinese: 热河战役; traditional Chinese: 熱河戰役; pinyin: Rèhé zhànyì, sometimes called the Battle of Jehol) was the second part of Operation Nekka, a campaign by which the Empire of Japan successfully captured the Inner Mongolian province of Rehe from the Chinese warlord Zhang Xueliang and annexed it to the new state of Manchukuo. The battle was fought from February 21 to March 1, 1933.