The invasion of laos was the first test of
operation rolling thunder
total containment
operation tonkin
vietnamization

The invasion of Laos was the first test of vietnamization.

Explanation:

The 1971 incursion of Laos is one of the neglected events of the Vietnam War. The Laotian incursion was anticipated to be a follow-up to the 1970 Cambodian invasion and was likewise designated as a “limited objective offensive” pointed at obstructing the progress of North Vietnamese armed rations into South Vietnam.

very positive impact on our industries in the west, sine they promoted settlement and increased the ways in which goods could be transported to market.