Yí dài dài zhànshì shǒuwèi zhe zǔguó de biānjiāng.
Generations of soldiers have guarded the country's frontier.
Tips
memory
Picture the right side as fields (田) stacked with dividing lines between them: that is exactly a 疆, the boundary line marking off territory. Common in 边疆 (frontier) and 疆域 (territory).
The right side is two fields 田 with lines drawn between and around them. It both gives the sound jiāng and pictures the dividing borders themselves, the heart of this character's meaning.
Filed under radical 田 (tián, #102) by convention. 田 is not a separate component in 疆, so no strokes are highlighted.