当时，驻守在汝南的国民党部队探知，小南海里有新四军小股部队，立即派出一个营的兵力，荷枪实弹，把小南海紧紧包围。
B-Time I-Time O O O O O O O B-Organization I-Organization I-Organization I-Organization I-Organization O O O B-Location I-Location I-Location I-Location O B-Organization I-Organization I-Organization O O B-Organization I-Organization O O O O O O O B-Person O B-Person I-Person O B-Thing I-Thing O O O O B-Location I-Location I-Location O O O O O