The WWII 2nd Pattern Fairbairn Sykes British Fighting Knife Broad Arrow B2 ↑B2 Variant is a specialized combat knife featuring a double-edged blade, designed for close combat. It is marked with the British military's broad arrow symbol and the B2 code, indicating its issuance and specific variant within the Fairbairn-Sykes series, which was widely used by British and Allied forces during World War II.