If you are slain in righteous battle, you will reach heaven.

हतो वा प्राप्स्यसि स्वर्गं जित्वा वा भोक्ष्यसे महीम्। तस्माद् उत्तिष्ठ कौन्तेय युद्धाय कृतनिश्चयः॥ If you are slain in righteous battle, you will reach heaven. If you are victorious, you will enjoy the earth. Therefore arise, O son of Kunti, and fight with firm determination. — Gita 2.37