Question: Which northern United States/southern Canada tribe was led by Jean-Baqtiste Assiginack in the early 19th century? 
Sentence (from "Pinetree Line"): The line was the first coordinated system for early detection of a Soviet bomber attack on North America, but before the early 1950s radar technology quickly became outdated and the line was in full operation only for a short time.
Relevant evidence: No