Complex sentence: After World War I, the British Indian Army was scaled down, on May 18,1921, two regiments were amalgamated at Sialkot their new title was now the 1st Duke of York's Own Skinner's Horse.
Split into simpler sentences: After World War I, the British Indian Army was scaled down. On May 18,1921, two regiments were amalgamated at Sialkot with the new title of the 1st Duke of York's Own Skinner's Horse.