What battle turned the tide for a theatre of war that the British 143rd Infantry Brigade saw active service in?
143rd Infantry Brigade (United Kingdom): The 143rd Infantry Brigade was an infantry brigade of the British Army that saw active service in both World War I and World War II. 143rd Infantry Brigade (United Kingdom):  In the First World War the brigade served on both Western Front and later the Italian Front. Western Front (World War I): The Western Front was the main theatre of war during the First World War.
i don't know