当时正处于国共合作初期，国民党反动派却伺机而动，不断制造磨擦，甚至密谋袭击竹沟的新四军。
B-Time I-Time O O O O O O O B-Time I-Time O B-Organization I-Organization I-Organization I-Organization I-Organization I-Organization O O O O O O O O O O O O O O O O O O O B-Thing I-Thing O B-Person I-Person I-Person O