Why did president richard nixon authorize an american invasion of combadia in 1970

The invasion was an attempt to disrupt the North Vietnamese supply lines.

Explanation:

President Richard Nixon authorized U.S. combat troops to cross from ... Nixon authorizes invasion of Cambodia, April 28, 1970, in an attempt to disrupt the North Vietnamese supply lines.

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.