Complex sentence: The 1958-1959 conflict was caused by the imposition of the One Unit plan which was implemented in 1955, this lead to further resistance and by 1957 Nauroz Khan announced his intention so secede and Pakistan declared martial law one day later.
Split into simpler sentences: The 1958-1959 conflict was caused by the imposition of the One Unit plan which was implemented in 1955. This led to further resistance, and by 1957 Nauroz Khan announced his intention to secede and Pakistan declared martial law one day later.