The Unit
MARCOS — the Marine Commando Force of the Indian Navy, raised in 1987 — is India's maritime special-operations unit, built for ship-boarding, amphibious reconnaissance, counter-terrorism, anti-piracy and hostage rescue. They operated in Mumbai during the 2008 attacks and run counter-insurgency patrols on Kashmir's Wular Lake.
Their reputation precedes them: adversaries reportedly nicknamed them the "bearded army," and they are known at home as "Magarmach" — crocodiles — for the way they come from the water. Like all Indian special forces, the unit keeps its specifics close.
The Gate
There is no direct civilian entry. A candidate must first join the Indian Navy, serve, and then volunteer for the Marine Commando Force. Even getting to the start line means being a fit, serving sailor in good standing.
What follows is one of the most attritional pipelines in any military.
Selection
Reportedly only 10–25% of those who begin become qualified Marine Commandos.
Pre-selection (3 days)
A three-day enrolment ordeal that, by repute, sheds 50–80% of volunteers in the first days — raw fitness, water work and will.
Selection (~5 weeks)
The survivors face roughly five weeks of selection built around a punishing "hell week" of sleep deprivation, loaded movement and relentless tasking.
Qualification & probation
Basic and then advanced special-forces training, including a probationary on-the-job phase, before a commando is fully qualified.
The Standards
MARCOS publishes little; indicative of the Selection tier this reference uses, with a maritime edge:
Train To The Standard
MARCOS rewards the swimmer who can also ruck and grind without sleep. The Gate's Selection tier maps the run, ruck, swim and strength base it's built on.