Complex sentence: This was one of the first series of an expanding bullet for military use, later banned in warfare by the Hague Convention as being "too inhumane", this then resulted in the full metal jacket bullet design being adopted.
Split into simpler sentences: This was one of the first series of expanding bullets for military use, They were later banned in warfare by the Hague Convention as being "too inhumane". This then resulted in the full metal jacket bullet design being adopted.