Polearm Martial

Grants proficiency on the spear, glaive, pike, quarterstaff, javelin, or halberd, you can use your bonus action to make a melee attack with the opposite end of the weapon dealing 1d4 bludgeoning damage, add the modifier of the weapon to increase its hit and damage.

When enemies enter your weapon reach it provokes an attack of Opportunity.

You can choose a mounted enemy for the entire round and ready a counter charge at them which provokes an attack of Opportunity, On a hit the enemy has to make a Dexterity saving throw to counter your strength ability check, You won't be able to focus on whats happening very well on the battlefield as your focus will be on the enemy in front of you and that chosen mounted enemy, forcing you to make a perception check for the entire round, whether you can see whats going on. unless you choose the Battle Master Class or Purple Dragon Knight.

Using Martial Weapons as Utility requires you to roll an ability check for the ff. Dexterity Acrobatics, Strength Athletics, On a fail on the difficulty level, roll saving throws for them instead, on a natural one the weapon at hand has a chance to break, roll a 1d20 dice for the weapons durability, if the roll is higher than 6 the weapon does not break, if other wise the weapon is broken.

Pick one Maneuver from the Battle Master archetype if you chose the fighter class,  if you have already chosen that class add 1 more maneuver 'known' in your character sheet, making it 4/3 maneuvers instead of 3/3.