Defence Minister Rajnath Singh today said armed forces must be prepared for all kinds of security challenges, including short-duration conflicts to even a five-year war, in view of an unpredictable geopolitical environment.

In an address at the ‘Ran Samvad’ at the Army War College Mhow, Madhya Pradesh, he said, In today’s era, wars have become so sudden and unpredictable that it is very difficult to predict when any war will end and how long it will last.