It's hard to bring your 'A' game on an empty stomach. The statement holds true for soldiers too.
But unlike us, they can't order a pizza when embroiled in a fight in the battlefield. They can't ask for timeouts from the enemy and go for sushi either. So how do they satisfy their hunger pangs in the line of fire?
This is what some of the armies around the world feed their soldiers to keep them well-nourished during armed conflicts.
On the German menu, we have sachets of grapefruit, Tang-like juice powder, Italian biscotti, liver-sausage spread and rye bread, goulash with potatoes, sour cherry and apricot jams.
The Canuck soldiers eat Bear Paws snacks WITHOUT maple syrup, salmon fillet with Tuscan sauce, vegetarian couscous, peanut butter and jelly sandwich.
Our Green Beret's devour on almond poppy seed pound cake, cranberries, spiced apple cider (of course non-alcoholic), peanut butter, crackers, pasta and tomato sauce.
No French fries for the French here. They feed on deer pâté, cassoulet with duck confit, creole-style pork, crème chocolate pudding, muesli, Dupontd'Isigny caramel,drink powder and coffee.
The Italian ration pack consists of a shot of 40% alcohol cordiale, a powdered cappuccino, biscotti, pasta, bean soup, canned turkey, rice salad, power sport bar, canned fruit salad and muesli chocolate bar.
Kenco coffee, Typhoo tea, bottle of Tabasco, chicken tikka masala, vegetarian pasta, pork and beans, sweets, Polos and teabags is what the British pack contains.
The Estonian soldiers are served with stuffed peppers, chicken-meat pâté, smoked sprats, and liver sausage with potatoes, crispbreads, halva with vanilla, muesli, fruit pocket and honey.
The Aussie menu has Vegemite, jam sandwich, biscuits, condensed milk, cheddar cheese, meatballs,chilli tuna pasta, sweets, soft drinks and chocolate ration on it.
The Danish soldiers' battlefield diet includes Earl Grey tea, beans and bacon in tomato sauce, a golden oatie biscuit and Rowntree's Tooty Frooties.
Nope, that bag doesn't have a burger in it. Singaporeans generally have great taste in food, but that doesn't translate into their army's on-field menu. They get Szechuan chicken noodles, mushroom, basil, rice and chicken dish; and soya milk with red-bean dessert in their daily diets.
Cans of green beans with ham, squid in vegetable oil, pate, sachet of powdered vegetable soup, peach in syrup, crackers, bread and a full assortment of vitamin tablets is what Spanish armymen get.