In Numbers 10 & 11, the trumpet's purpose is explained and will be used for assembling people, moving forward, battle calls, and feasts and celebrations. When Jesus returns, a trumpet will sound. The trumpet will call all His people to Him, moving us up to be with Him. A battle will break out as the tribulation period begins and when the victory is won defeating Satan once and for all, a celebration like no other will begin. The Israelites set out on their first move led by the tribe of Judah - just as Jesus is our almighty leader in life today. It doesn't take long before the people begin to complain. They no longer feel the manna is good enough and want more. God reminds Moses of His mighty power and their complaints and gluttony are quickly dealt with. If God's manna is not enough for us, nothing in this world ever will be. If Jesus is not enough to satisfy us in every single way, nothing on earth ever will.