ما هي أهم الأعمال التي قام بها أبو بكر في خلافته؟

Among the most important deeds of Abu Bakr Al-Siddiq, may Allah be pleased with him, are: his acceptance of the pledge of allegiance for the welfare of the Muslims, his steadfastness in dispatching the army of Usama ibn Zayd, his fighting against the apostates and those who withheld zakat, his equipping of armies for the conquests of Al-Sham, and his appointing of Umar ibn Al-Khattab, may Allah be pleased with him, as his successor.