Complex sentence: The NATO troops' objective was, basically, to capture a grouping of villages known as Pashmul, which had been the site of repeated battles throughout the summer of 2006 and where several Canadian soldiers were killed on August 3.
Split into simpler sentences: The NATO troops' objective was, basically, to capture a grouping of villages known as Pashmul. Pashmul had been the site of repeated battles throughout the summer of 2006, with several Canadian soldiers being killed there on August 3.