This should be the arrangement for attacking the enemy. The veterans of the army should fight in the van. They would protect their comrades in the rear.
परेषां प्रतिघातार्थं पदातीनां च बृंहणम्। अपि तस्मिन् पुरे वृद्धा भवेयुर्ये पुरोगमाः॥