英和和英

Let's fight together

give a fight

Fight together

have a fight

be engaged in a fight

put up a fight

to join battle （with the enemy）

to join battle

Let's do our best together.

Let's both do our best.

keep fighting

A battle is raging

A battle is going on

The battle is in full swing.

to give battle to the enemy―challenge the enemy

to throw down the gauntlet―fling down the glove

to give battle to the enemy―throw down the gauntlet―fling down the glove

offer battle

to fight

fight bloodily

conspire together

to fight one's way

to fight

to fight

to fight each other

to mix something with something else

to serve in the army

to fight one's way―fight every inch of the ground

go about together

engage in a conflict