Complex sentence: Henry Antill was appointed aide-de-camp to Governor Lachlan Macquarie (1762-1824) on his arrival in Sydney on January 1st,1810, was promoted to Major of Brigade in 1811 and retired from the British Army in 1821.
Split into simpler sentences: Henry Antill was appointed aide-de-camp to Governor Lachlan Macquarie (1762-1824) on his arrival in Sydney on January 1st,1810. He was promoted to Major of Brigade in 1811 and retired from the British Army in 1821.