Complex sentence: In August 1952, he graduated from the religious High School of "Yavne" and joined the Israeli Army in the framework of Benei Akiva (a religious youth organization), the "Nahal".
Split into simpler sentences: In August 1952 he graduated from the religious High School of "Yavne". He then joined the Israeli Army in the framework of Benei Akiva (a religious youth organization), the "Nahal".