single one line drawing marine combat knives. military combat knife, knife of marine corps and u.s. navy. swirl curl style. modern

american army assault background battle black blade clip art combat concept continuous curl dagger doodle drawing equipment fight force hand drawn handle isolated knife line marine metal military minimalism minimalist navy one protection reinforcement safety seals security simple simplicity single stab swirl tactical tool usmc vector war weapon web knives corps u s navy style modern draw design graphic