Defence Minister Rajnath Singh performed 'shastra puja' or customary worship of weapons, at Sukna War Memorial in West Bengal.
He also paid tribute to martyrs and laid a wreath at the memorial.
Singh was accompanied by Chief of Army Staff General MM Naravane.
Speaking on the sidelines, the minister said that India wants peace at the border with China, but the country's soldiers won't let even an inch of land be captured by enemies.
Later, he inaugurated an alternate alignment road to NH 310 built by the Border Roads Organisation in Sikkim.
The inauguration was done via video conferencing.
Singh listed other border roads projects under progress in the state.
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