Usage patterns
国内で〈事〉が起こるfor something to happen domestically
A major earthquake occurred within the country.
国内初の〈物〉the first ... in the country
This technology is the first attempt of its kind in the country.
国内最大の〈物〉the largest ... in the country
That factory boasts the largest production volume in the country.
国内向けに〈動詞〉to do something aimed at the domestic market
This product is sold for the domestic market.