Complex sentence: The 13th RWF managed to push further ahead and secured a section of high ground overlooking the German lines, fought off several German counter-attacks and took and six machine guns but the atttack was costly, the 13th RWF suffering over 400 wounded.
Split into simpler sentences: The 13th RWF managed to push further ahead and secured a section of high ground overlooking the German lines, fought off several German counter-attacks and took and six machine guns. Despite these successes, the atttack was costly with the 13th RWF suffering over 400 wounded.