Mars opposite Lilith (orb 4.8°) puts the two planets face to face, with visible back-and-forth or tension. The orb is moderate; it stays secondary beside tighter signatures.
Here, Mars in Aries in House 10 brings action, courage, competition, and effort into House 10 (vocation, status, responsibility, and public image), with Aries style (initiative, speed, confrontation, and direct action); Lilith in Libra in House 4 brings pure ideal, absolute demand, fascination, and refusal of compromise into House 4 (roots, privacy, and inner foundation), with Libra style (relationship, balance, negotiation, and sense of form).
Concrete conflict: this aspect opposes direct action to the absolute ideal, fascination, or refusal of compromise. Visible angle: Mars near the Midheaven (orb 1.0°) and Lilith near the IC (orb 5.7°) touch angles; this aspect is easier to notice through social role, reputation, career, and public image; also through private base, family roots, and intimate psychological climate. The house conflict is between House 10 (vocation, status, responsibility, and public image) and House 4 (roots, privacy, and inner foundation); pressure in one field tends to reactivate the other.