soldier on
verb- To continue or persist, despite adversity or difficulty. · He soldiered on through the night, working hard and not sleeping.
From the library
The King and Queen of Hearts were seated on their throne when they arrived, with a great crowd assembled about them—all sorts of little birds and beasts, as well as the whole pack of cards: the Knave was standing before them, in chains, with a soldier on each side to guard him; and near the King was the White Rabbit, with a trumpet in one hand, and a scroll of parchment in the other.
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