by faith...Jericho

Interesting. Scripture tells of a city, not the one who led the people to "march seven times around."

"By faith the walls of Jericho fell down..." (Heb11.30)

Clearly, study should go to the significance of this ancient city before telling of the faith of the one who led the priests and "armed men or men of war, "to march, 

• with the ark of the Lord, 
• quietly, 
• with the exception of blowing the trumpets as they started around each time and as each round was completed, 
• seven times around,
• until the shout went up on the seventh revolution round the city
• "and the walls came tumbling down." (Joshua 6)

Why Jericho?  The Walls of Jericho were a defensive or flood protection wall suggested to date to approximately 8000 BC. If interpreted as an "urban fortification", the Wall of Jericho is the oldest city wall discovered by archaeologists anywhere in the world. https://en.m.wikipedia.org/wiki/Wall_of_Jerich These walls, at least 13 feet in height and backed by a watchtower or redoubt some 28 feet tall.
To put this into perspective, envision a 4 story tall building. Such was the height of the walls of Jericho. On the other side of the double wall, the embankment continued to climb upwards. The third tier was at the very top of the embankment, where yet another mud-brick wall stood.
At their base, the walls of Jericho stood 46 feet (14m) above ground level outside the retaining wall. To the Israelites below, Jericho seemed impenetrable.

 The total area of the city was probably about ten acres.  So, in all probability, the children of Israel could've marched around the city several times in one day. http://www.israel-a-history-of.com/walls-of-jericho.html

To conquer this city, on foot, would've been in a word, impossible.  It was all uphill with impenetrable stone walls.  All Joshua and his men had would've been homemade swords and no ladders or ropes long enough to hoist themselves upward.  Ahh, but they had so much more.  They had the Lord and His Word.  They were told, clearly, what to do in the book of Joshua, chapter six.  Note the warrior's encounter in Joshua 5.13 and 14,  before the battle ensued.  Joshua saw, "a man...with his sword drawn.." who said, "but captain of the host of the Lord am I now come."   Remember, years later how David said of his fight with Goliath, "the battle is the Lord's." (I Sam 17.47)

Dear believer, any battle you face is not yours. Does it seem impossible to survive and go on?  God put your battle or your problem there for His glory.  Why?  Can't answer that but to point to His Word and know that He is always there beside you, fighting for you, in His time and His way.  They were told to march Seven times around.

In God's economy, seven is the number of completion and perfection.  Much explanation aside regarding the number 7, take it for just that.  God's way is perfect and complete.  If you will "fight" your battle His way, He will prevail and you will be victor.  You will see the enemy fall. (Isa 54.17) "No weapon that is formed against thee shall prosper...this IS the heritage of the servants of the Lord..."

When the walls are too high and impossible, trust in the Lord and His Word for victory.