In Mark 1:15, what did Jesus proclaim was near?

Answer: The kingdom of God

Jesus preached, 'The time is fulfilled, and the kingdom of God is near. Repent and believe in the gospel!'

“After the arrest of John, Jesus went into Galilee and proclaimed the gospel of God. “The time is fulfilled,” He said, “and the kingdom of God is near. Repent and believe in the gospel!””— Mark 1:14-15 (BSB)