Complex sentence: The brigade held the town for 10 days against attack by the Imperial Japanese Army; some 500 troops from the battalion fought their way back to Singapore and were attacked on all sides at Braddell Road in Singapore before being also ordered to surrender.
Split into simpler sentences: The brigade held the town for 10 days against attack by the Imperial Japanese Army and then some 500 troops from the battalion fought their way back to Singapore. The battalion was then attacked on all sides at Braddell Road in Singapore before it was also ordered to surrender.