Original sentence: Pakistan has the seventh largest armed forces in the world and is a declared nuclear weapons state.Since independence, Pakistan has experienced times of significant military and economic growth, and times of instability, with the secession of East Pakistan (present-day Bangladesh)
Edited sentence: Since independence, Pakistan has experienced constant security threats from its hostile neighbours namely Afghanistan and India, Aswell as the Soviet Union, Despite the security challenges the country has faced over the past half century it has secured its existence by amassing the seventh largest armed forces in the world and is a declared nuclear weapons state